第5次作业详解

第5次作业详解（共6篇）

篇1：第5次作业详解

成本会计第5次作业答案

第8章生产损失的核算

18.单项选择题（4×10＝40分）

⑴下列各项中，属于可修复废品损失的是（）。A.返修以前发生的生产费用，B.可修复废品的生产成本，C.返修过程中发生的修复费用，D.返修以前发生的生产费用加上返修过程中发生的修复费用。⑵季节性停工期间的停工损失应计入（）账户。A.营业外支出，B.制造费用，C.其他应收款，D.基本生产成本。

⑶可修复废品返修前发生的生产费用（）。A.应借记“废品损失”账户，B.与修复费用一起转入“基本生产成本”账户借方，C.应从“基本生产成本”账户贷方转出，D.不是废品损失，不必计算其生产成本。⑷在单独核算废品损失的企业，如果月末既有在产品又有完工产品，其发生的废品损失一般（）。

A.直接作为期间费用，B.全部由月末在产品承担，C.全部由完工产品承担，D.在产品和完工产品之间采用特定方法进行分配。

19.多项选择题（3×10＝30分）

⑴与“废品损失”账户借方对应的账户可能有（）。A.原材料，B.其他应收款，C.制造费用，D.基本生产成本，E.应付职工薪酬。

⑵下列各项可以计入产品成本的停工损失有（）。A.自然灾害引起的停工损失，B.由于计划减产原因引起的停工损失，C.机器设被备发生故障而引起的停工损失，D.由于原材料供应不足发生的停工损失，E.由负责人赔偿的停工损失。

⑶盘亏和毁损的在产品经过审批处理后，应分别不同情况将损失从“待处理财产损溢”账户的贷方转入（）账户的借方。A.其他应收款，B.管理费用，C.营业外支出，D.制造费用，E.基本生产成本。

20.判断题（3×10＝30分）

⑴废品仅指工业企业在生产过程中发现的废品；

⑵在没有应收赔款的情况下，废品的报废损失也就是废品的净损失。

⑶废品损失是指不可修复废品的生产成本扣除回收残料、废料价值后的净损失。

参考答案：

18.单项选择题

⑴D⑵B⑶D⑷D

19.多项选择题

⑴AE ⑵BCD⑶ACD

20.判断题

⑴×⑵√⑶×

篇2：第5次作业详解

李俊

201203909 ❶.比较两电平电压型逆变器和三电平电压型逆变器的区别。解答：⑴．结构上：两电平式逆变器可以把直流中间环节的正极或负极电位接到电动机上，结构简单，需要开关元件少；三电平式逆变器除了把直流中间环节的正极或负极接到电动机上外，还可以把直流中间环节的中点电位送到电动机上去。三电平式逆变器结构复杂，需要开关元件多。

⑵．功能上：三电平式逆变器相对于两电平式逆变器，电网电流波形更接近与正弦波，谐波分量减小，具有更好的输出性能和可靠性。

⑶．应用上：两电平式逆变器在电力机车应用广泛；而三电平式逆变器应用很少，如CRH2。

❷.简述变流器中间储能环节的作用及组成。

解答：①.电压型脉冲四象限变流器中间直流环节由两个部分组成：ⅰ.相应于2倍电网频率的串联谐振电路(也可以取消)；ⅱ.是滤波电容器

支撑电容器和过电压限制电路。②.在交—直—交流变流器中,中间直流储能环节的作用：ⅰ.是连接四象限脉冲整流器和负载端逆变器之间的纽带；ⅱ.起到稳定中间环节直流电压的作用；ⅲ.承担着与前后两级变流器进行无功功率交换和谐波功率交换的作用。❸.分析两电平式电压型逆变器的工作过程及输出特征。

解答：⑴.电压型两电平式六阶波型三相逆变器： ⅰ.工作过程：六阶波型三相逆变器中各相采用纵向换流，每次换流都是在同一相上下2个桥臂之间进行，每个开关元件在一个周期中导通180°电角度，其他两相也是如此，只不过三相对应元件相差120°电角度轮流导通，使VT1~VT6各元件每隔60°电角度轮换导通。在每一时刻都有3个开关元件同时导通，可能是上面一个桥臂，下面2个桥臂；也可能是上面2个桥臂下面一个桥臂。如下图所示：

ⅱ.输出特征：对于A相，当桥臂1导通时UAN=Ud/2；当桥臂4导通时，UAN=-Ud/2，即UAN的波形是幅值为Ud/2的方波。B、C相的情况与A相类似，其波形UAN,UBN,UCN相同，只是在相位上依次相差

120°。其线电压和相电压特性见上图所示。当逆变器按照六阶波方式输出时，其相电压波形为六阶波、线电压为矩形波。六阶波的变化趋势基本上接近于正弦波。当逆变器以六阶波电压对牵引电动机供电时其电流波形在负载电感的作用下将趋于平滑，其平滑程度将于六阶波的频率有关。当电压频率较高时，将获得接近于正弦波的电流波形，当电压频率较低时电流波形将与电压波形接近；频率越低电流波形也越接近六阶波，但其中的高次谐波成分也越多。如下图所示：

⑵．电压型两电平式三相PWM逆变器：

ⅰ.工作过程：逆变器电路采用双极性调制方式，a、b、c、三相的PWM控制共用一个三角形载波UC调制信号，Ura、Urb、Urc依次相差三分之一周期。三相控制规律相同。以a相为例进行分析，当UraUrc时，给上桥臂开关元件VT1以导通信号、下桥臂开关元件VT4以关断信号，则a相相对于直流电源假想中点N的输出电压UaN=Ud/2。当UraUrc时，给VT4以导通信号，给VT1以关断信号，则有UaN=-Ud/2。VT1和VT4的驱动信号始终是互补的。当给VT1(VT4)施加导通信号时，可能是VT1(VT4)导通，也可能是二极管VD1(VD4)续流导通，这要由感性负载中电流的方向来决定。

ⅱ.输出特征：相对直流电源假想中点N的各相电压波形，都只有2种电平，即Ud/2,-Ud/2。线电压

有±2Ud/

3、±Ud/3和0共5种电平组成。

❹.分析三电平式脉冲整流器的工作过程。当开关元件VT1和VT6导通时UabUd，当VT3和UabUaNUbN，线电压可有三种电平，即Ud,-Ud,0。和VT6导通时Uab0。逆变器输出相电压PWM波形VT4导通时UabUd,当开关元件VT1和VT3或VT

4解答：在整流(牵引)或逆变(再生)工况下UsUd、UsUd各对应1种导通回路。UsUd/

2、UsUd/2各对应2种导通回路。而Us0则对应着3种导通回路。根据脉冲整流器等效电路，若忽略Us与iN高次谐波，只考虑其基波Us1与iN1，则UN=iN1Z+ Us1,调整Us1的幅值和相位，可使iN1在4个象限内随意变化。在牵引工况下，iN1、UN同相位。在逆变工况下iN1、UN反相位。功率因数接近1。四象限脉冲变流器的就是按照这一基本原理工作、调节控制的。

⑴.牵引工况调节过程: 设系统原稳定运行于A点,此时iN1与UN同相位,二者夹角θ=0,功率因数为1。当负载增加时，中间直流环节电压Ud瞬时下降,同时Us1的幅值也下降,系统工作点由A点移至A’点运行,电流iN1与电压UN之间出现相位角,导致θ=θ1>0(假定顺时针方向为正,下同)；通过控制电路调整Us1的幅值及相位角φs使它们逐步增大，电流iN1与电压UN之间的相位角θ相应在减小，其工作点将由A’点调整到A’’点θ=0恢复到iN1与UN同相位。此时O A’’>O A输入电流iN1也相应地增加。系统将在A’’点建立起新的平衡状态适应负载增加。若负载减小时，Ud瞬时上升，Us1的幅值也瞬时上升，电流iN1与电压UN之间出现相位角，系统工作点由A点移至B’点运行，导致θ=θ2<0。

通过控制电路调整Us1的幅值及相位角φs使其减小，电流iN1与电压UN之间的相位角θ相应地在逐步增大，可将Us1由B’点逐步调整到B”点。θ=0，iN1恢复到与UN同相位。此时O B”

⑵.再生制动工况调节过程: 设系统原稳定运行于A点,此时iN1与UN相位相反,即φ=θ=180°、cosφ=-1。当再生制动回馈电能增加时Ud瞬时上升使得Us1幅值也瞬时上升,系统工作点由A点移至B’点运行电流iN1与电压UN之间的相位角θ顺时针转过一角度,将导致θ=θ2<180°。通过控制回路调整Us1的幅值| Us1|及φs，增大| Us1|减小φs（逆时针方向）可使B’

iN1与UN反相位。调整到B”，θ=180°，同时O B’’>O A,表明逆变过程输出电流增加，即回馈到电网的电流增加，以适应再生回馈能量的增加。

篇3：第5次作业详解

猪后臀尖肉价格微涨至每500克8.66元;猪五花肉价格微降至每500克7.83元。这是5月份以来猪后臀尖肉价格第三次出现微涨, 也是猪五花肉和猪后臀尖肉价格走势首次出现反向变动。

全国11个地市猪后臀尖肉价格上涨, 湖南怀化、云南西双版纳价格涨幅较大, 12个地市价格下降。

篇4：航天飞机倒数第5次飞行

约8分半钟后，“奋进”号顺利进A预定轨道。按计划，“奋进”号于10日与空间站对接。美国东部时间2月21日22时20分，“奋进”号平安降落在肯尼迪航天中心。

“奋进”号此行为国际空间站送去了“宁静”号节点舱和一个“炮塔”穹顶天体观测台。在空间站上，“宁静”号节点舱与天体观测台连接在一起，空间站上的多个生命支持与环境控制系统以及为航天员提供的。额外房间将安放在“宁静”号内，而重1.6吨、高1.5米、直径3米的天体观测台则能方便航天员对地球、其他天体及航天器进行全景观测。

此外，“奋进”号还携带着重约1吨的装置，如为尿液处理系统准备的新蒸馏设备、流体控制泵、为水处理系统准备的外部过滤装置等。

此次共有6名航天员随“奋进”号升空，其中指令长为乔治赞姆卡，飞行员为特里·维尔茨。他们在为期13天的任务期内要进行3次太空行走，安装“宁静”号及“炮塔”。两者安装完毕后，空间站的建设任务将完成约90％。

“奋进”号是美国航天局今年执行飞行任务的首架航天飞机。美国现役3架航天飞机——“发现”号、“奋进”号和“阿特兰蒂斯”号在今年退役前共将飞行5次，以完成空间站的基本建设任务。

国际空间站为“宁静”号空出对接接口

1月23日，肯尼迪航天中心39A发射台的指令长杰夫·威廉姆斯和飞行工程师克里默将“宁静”号节点舱装进“奋进”号航天飞机的有效载荷舱，并关闭了有效载荷舱的舱门，而国际空间站上的航天员完成了一次关键的机械臂操作任务，为“奋进”号航天飞机即将运来的“宁静”号节点舱空出了一个对接接口。

国际空间站上的航天员利用加拿大机械臂将“3号加压转接器”(PMA3)从“团结”号节点舱左侧卸下，然后将其安装到“和谐”号节点舱顶部。加压转接器的作用与隧道类似，能将国际空间站上两个大的舱段连通起来。例如，“1号加压转接器”通过将美国的“团结”号节点舱与俄罗斯的“曙光”号功能货舱连通起来，实现了国际空间站上美国舱段与俄罗斯舱段的连通。

在“宁静”号节点舱与国际空间站对接之后，国际空间站上的航天员将再次使用加拿大机械臂将“3号加压转接器”安装到“宁静”号节点舱的外部对接接口上。

国际空间站参与国已同意延长空间站寿命

俄罗斯“能源”火箭航天集团总裁兼总设计师维塔利·洛波塔1月26日透露，国际空间站参与国已经就将国际空间站使用期限延长至2020年达成一致。

洛波塔当天在莫斯科举行的一个航天会议上说，国际空间站的参与国经过协商，一致同意将国际空间站的使用期限延长至2020年。相关文件将在接下来的一两个月内签署。同时他还表示，空间站的建设期限也将延长至2015年。

洛波塔说，国际空间站是迄今为止人类最为昂贵的项目，目前其花费已达1 200亿美元，其总重量超过330吨。

国际空间站于1 998年正式开始建设，2000年11月，国际空间站首批长期考察组成员开始驻站。国际空间站最初设计寿命可至2015年，包括俄罗斯在内的多个国家之前曾多次表示希望延长国际空间站的使用年限。俄塔社报道说，从国际空间站建设至今，已有1 87人造访过国际空间站，他们来自美国、俄罗斯、加拿大、日本、南非、韩国、巴西、马来西亚及部分欧洲国家。

“宁静”号的命名纷争

斯蒂芬·科尔伯特是美国著名电视脱口秀主持人。不过，他在美国以外知名度不高。2009年年初，美国航宇局在网上举办的征名活动给科尔伯特带来扬名机会。

按照活动要求，这个名字应能反映空间站蕴涵的探索与合作精神，秉承“团结”号节点舱与“和诣”号节点舱的名字风格。航宇局给出“地出”、“传奇”、“宁静”、“冒险”等4个选择，请网民投票选出一个最喜欢的名字。如果4个备选都不合意。网民还可另外提交一个名字。科尔伯特在自己主持的节目中批评这些给出的名字“不是太空名字，而是有机茶的名字”，呼吁观众提交他的名字。

号召一出，“粉丝”们立即行动。短短几天，超过45.1万人参加网上征名活动，“科尔伯特”获得近11.5万票占据首位，“宁静”以98641票位居第二。

“粉丝”们热情高涨，但是新节点舱的名字并不由网民说了算。

征名活动规则明确写道，美国航宇局会考虑投票结果，但是不受投票结果约束，保留做出最终决定的权力。投票活动定于2009年3月20日截止。

2009年4月15日美国航宇局网站报道，在经历网络在线命名征集及评选活动后，此前被非正式的称为节点3的国际空间站新成员舱正式被命名为“宁静”(Tranquility)。美国当地时间4月14日，曾经作为国际空间站第14批和第15批考察团成员的女航天员苏尼塔·威廉姆斯在一档晚间电视节目中宣布了该结果。

航天运行部副主任比尔·格斯登迈尔称，40年前的7月，“阿波罗”11在月球上的静海登陆。选择“宁静”作为节点3的名称是因为该名称与探索和月球有关，同时也是空间站国际合作精神的象征。

这次活动是航宇局第二次为国际空间站的美国组件征询公众意见。上一次征名活动中，“和谐”号产生于2200名学生所做选择。

自国际空间站建设开始以来，空间站已经有9个舱室，分别以“曙光”、“团结”、“星辰”、“命运”、“寻求”、“码头”、“和谐”、“哥伦布”和“希望”命名。

新的节点舱将附带一个穹顶，穹顶有六面矩形窗户和一个圆形天窗，身处其中的航天员可以360度看到地球和空间站。另外，穹顶中还有一个机械臂操作站。

“宁静”号节点舱

“宁静”号节点舱由欧洲空间局与意大利宇航局共同管理和拥有的泰雷兹阿莱尼亚宇航公司建造，归属美国航宇局所有和操纵。

“宁静”号节点舱装备6个能提供能量、数据指令和热源与环境控制的通用连接装置，这些通用连接装置可以连接航天员的生活舱，也可以连接飞船。其中的一个通用连接装置连接了穹顶舱，穹顶舱将安置一个机器臂操作站，为整个空间站提供一个观测地球的窗口。

篇5：第5次作业详解

本次作业是本门课程本学期的第5次作业，注释如下：大学英语III 第5单元 作业题

一、单项选择题(只有一个选项正确，共40道小题)1.– What do you want, Mary? –(A)Sorry, I want some water.(B)Yes, I plan to go shopping.(C)I’d like some red wine, please.(D)No, I don’t eat.你选择的答案： [前面作业中已经做正确] [正确] 正确答案：C 解答参考：[第五单元]

2.– Is there a room available for tonight? – Yes, Sir.May I help you? –(A)Thank you.(B)I’m hoping to book a single room.(C)I want to go for a walk.(D)No, that’s fine.你选择的答案： [前面作业中已经做正确] [正确] 正确答案：B 解答参考：[第五单元]

3.– What are you going to do? –

(A)I’m planning to go to the cinema with my friend.(B)No, I’m not going to do it.(C)Thank you for asking me about it.(D)Yes, I’ll go.你选择的答案： [前面作业中已经做正确] [正确] 正确答案：A 解答参考：[第五单元]

4.– Do you want to learn French? –(A)Yes, I want.(B)No, I not want.(C)Yes, I do.(D)No, I won’t.你选择的答案： [前面作业中已经做正确] [正确] 正确答案：C 解答参考：[第五单元]

5.– Drinking is not good to your health.–

(A)I don’t know what to do.(B)I would like it very much.(C)I should go to a doctor.(D)I’ve decided to give up drinking.你选择的答案： [前面作业中已经做正确] [正确] 正确答案：D 解答参考：[第五单元]

6.– Do you have any plan this year? –(A)Not at all.(B)I mean to go to United States for further studies.(C)Yes, I will.(D)I’m certainly not going to do that kind of thing.你选择的答案： [前面作业中已经做正确] [正确] 正确答案：B 解答参考：[第五单元]

7.–

– Ok, please fill out this form.(A)I wish to open a savings account.(B)What are you doing?(C)Do you need any help?(D)I have no idea.你选择的答案： [前面作业中已经做正确] [正确] 正确答案：A 解答参考：[第五单元]

8.–.I can’t make myself understood.– Take it easy.We are trying to help you.(A)Thank you for helping me(B)I won’t do it again

(C)I’d like to have a Chinese interpreter

(D)I’d like to go somewhere

你选择的答案： [前面作业中已经做正确] [正确] 正确答案：C 解答参考：[第五单元]

9.– Harry, do you like the course taught by Mr.Elsie? –

(A)Mr.Elsie is a good man.(B)OK.I’ll learn it.(C)No.I’ve no intention of taking this course.(D)I’m sure I can do it better.你选择的答案： [前面作业中已经做正确] [正确] 正确答案：C 解答参考：[第五单元]

10.– It is cold today.What would you like to do this afternoon? –

(A)I don’t think so.(B)Yes, it’s cold.But spring is coming.(C)I need my coat, please.(D)Yes, it’s too cold, so I don’t feel like going out today.你选择的答案： [前面作业中已经做正确] [正确] 正确答案：D 解答参考：[第五单元]

11.The new appointment of our president ____________ from the very beginning of next semester.(A)takes part(B)takes effect(C)takes place(D)takes turns 你选择的答案： [前面作业中已经做正确] [正确] 正确答案：B 解答参考：[第五单元]

12.Although a teenager, Fred could ____________ being told what to do and what not to do.(A)persist(B)consist

(C)insist(D)resist 你选择的答案： [前面作业中已经做正确] [正确] 正确答案：D 解答参考：[第五单元]

13.Computer technology will ____________ a revolution in business administration.(A)bring around(B)bring out(C)bring about(D)bring up 你选择的答案： [前面作业中已经做正确] [正确] 正确答案：C 解答参考：[第五单元]

14.The twentieth century has witnessed an enormous worldwide political, economic and cultural ____________.(A)transformation(B)tradition(C)transportation(D)transmission 你选择的答案： [前面作业中已经做正确] [正确] 正确答案：A 解答参考：[第五单元]

15.Don’t let the child play with scissors ____________ he cuts himself.(A)so that(B)now that(C)in case(D)only if 你选择的答案： [前面作业中已经做正确] [正确] 正确答案：C 解答参考：[第五单元]

16.The teacher said that we ____________ another chance some time next month if we failed in the exam.(A)would be given(B)would give(C)will be given

(D)were given 你选择的答案： [前面作业中已经做正确] [正确] 正确答案：A 解答参考：[第五单元]

17.A really powerful speaker can ____________ the feelings of the audience to the fever of excitement.(A)work out(B)work up(C)work over(D)work at 你选择的答案： [前面作业中已经做正确] [正确] 正确答案：B 解答参考：[第五单元]

18.____________, they immediately left the house.(A)Being heard the noise(B)Hearing the noise(C)They heard the noise(D)They were hearing the noise 你选择的答案： [前面作业中已经做正确] [正确] 正确答案：B 解答参考：[第五单元]

19.He decided to make further improvements on the computer’s design ____________ the light of the requirements of customers.(A)for(B)by(C)with(D)in 你选择的答案： [前面作业中已经做正确] [正确] 正确答案：D 解答参考：[第五单元]

20.The traditional approach ____________ with complex problems is to break them down into smaller, more easily managed problems.(A)to dealing(B)in dealing(C)dealing(D)to deal

你选择的答案： [前面作业中已经做正确] [正确] 正确答案：A 解答参考：[第五单元]

21.____________, Newton was thinking and thinking.(A)He lied under the apple tree(B)Laying under the apple tree(C)He laid under the apple tree(D)Lying under the apple tree 你选择的答案： [前面作业中已经做正确] [正确] 正确答案：D 解答参考：[第五单元]

22.In the old days, the children ____________ by the mother because she did not work outside the house.(A)took care of(B)were taking care of(C)taken care of(D)were taken care of 你选择的答案： [前面作业中已经做正确] [正确] 正确答案：D 解答参考：[第五单元]

23.“Do you know that girl with the long hair?” “I don’t think so, although she ____________ me of someone else I know.”(A)remembers(B)recalls(C)reminds(D)suggests 你选择的答案： [前面作业中已经做正确] [正确] 正确答案：C 解答参考：[第五单元]

24.If you want to know the times of buses, please ____________ at the office.(A)inform(B)inquire(C)require(D)request 你选择的答案： [前面作业中已经做正确] [正确]

正确答案：B 解答参考：[第五单元]

25.No ____________ woman would go alone to a bar like that one.(A)respectful(B)respecting(C)respectable(D)respective 你选择的答案： [前面作业中已经做正确] [正确] 正确答案：C 解答参考：[第五单元]

26.For centuries, the Atlantic Ocean kept the America from ____________ by the people of Europe.(A)discovering(B)being discovering(C)being discovered(D)discovered 你选择的答案： [前面作业中已经做正确] [正确] 正确答案：C 解答参考：[第五单元]

27.Her husband died in 1992, ____________.(A)left her with two children(B)being left her with two children(C)leaving her with two children(D)being leaving her with two children 你选择的答案： [前面作业中已经做正确] [正确] 正确答案：C 解答参考：[第五单元]

28.She ever being so kind to me.I felt ____________ to help her when she was in trouble.(A)generous(B)obliged(C)virtuous(D)detached 你选择的答案： [前面作业中已经做正确] [正确] 正确答案：B

解答参考：[第五单元]

29.I’m glad ____________ to look around your research center.(A)to allow(B)having allowed(C)to be allowed(D)being allowed 你选择的答案： [前面作业中已经做正确] [正确] 正确答案：C 解答参考：[第五单元]

30.He decided to go for a sailing holiday ____________ the fact that he was usually seasick.(A)in spite of(B)because of(C)in case of(D)as a result of 你选择的答案： [前面作业中已经做正确] [正确] 正确答案：A 解答参考：[第五单元]

31.I regret having left the work unfinished, I ____________ everything ahead carefully.(A)should plan(B)should have planned(C)planned(D)must plan 你选择的答案： [前面作业中已经做正确] [正确] 正确答案：B 解答参考：[第五单元]

32.Ms.Wright demanded that the urgent report ____________ on her desk by 5 p.m.today.(A)should put(B)will be put(C)is put(D)be put 你选择的答案： [前面作业中已经做正确] [正确] 正确答案：D 解答参考：[第五单元] 8

33.____________, Miss Brown decided to take a taxi.(A)She thought she must be late(B)Being thought she must be late(C)When thought she must be late(D)Thinking she must be late 你选择的答案： [前面作业中已经做正确] [正确] 正确答案：D 解答参考：[第五单元]

34.The older New England villages have changed relatively little ____________ a gas station or two in recent decades.(A)in addition(B)except for(C)except to(D)besides 你选择的答案： [前面作业中已经做正确] [正确] 正确答案：B 解答参考：[第五单元]

35.Herman’s success is due to his hard work and his ability to ____________ plans, which will get work done efficiently.(A)fulfill(B)approve(C)employ(D)conduct 你选择的答案： [前面作业中已经做正确] [正确] 正确答案：C 解答参考：[第五单元]

36.“You are very selfish.No ____________ you are not the most important person in the world.” Edgar said to his boss angrily.(A)suspect(B)reason(C)doubt(D)cause 你选择的答案： [前面作业中已经做正确] [正确] 正确答案：C 解答参考：[第五单元]

37.The soldier was accused of ____________ the officials by rumoring that the enemy attacked.(A)cheating(B)scolding(C)lying(D)punishing 你选择的答案： [前面作业中已经做正确] [正确] 正确答案：A 解答参考：[第五单元]

38.Floods cause billions of dollars worth of property damage ____________.(A)annually(B)relatively(C)actually(D)comparatively 你选择的答案： [前面作业中已经做正确] [正确] 正确答案：A 解答参考：[第五单元]

39.The director was critical ____________ the way we were doing the work.(A)at(B)in(C)of(D)with 你选择的答案： [前面作业中已经做正确] [正确] 正确答案：C 解答参考：[第五单元]

40.At a press conference after the award ceremony, the 18-year-old girl spoke in a ____________ low voice.(A)optionally(B)relatively(C)legally(D)identically 你选择的答案： [前面作业中已经做正确] [正确] 正确答案：B 解答参考：[第五单元]

三、阅读理解、完形填空题(共5道小题)42.Thanksgiving is celebrated every year on the fourth Thursday of November.The month of November is in autumn, the main season for harvesting crops.The writer O.Henry called Thanksgiving the one holiday that is purely American.It is not a religious holiday.But it has spiritual meaning.Thanksgiving began with the first European settlers in America.They gathered their crops, celebrated and gave thanks for the food.Tradition says Pilgrim settlers from England celebrated the first Thanksgiving in 1621.There is evidence that settlers in other parts of America held earlier Thanksgiving celebrations.But the Pilgrims’ Thanksgiving story is the most popular.The Pilgrims were religious dissidents who fled oppression in England.They went first to the Netherlands.Then they left that country to establish a colony in North America.The Pilgrims landed in 1620 in what later became known as Plymouth, Massachusetts.Their voyage across the Atlantic Ocean was difficult.Their first months in America were difficult, too.About one hundred Pilgrims landed just as autumn was turning to winter.During the cold months that followed, about half of them died.When spring came, the Pilgrims began to plant crops.An American Indian named Squanto helped them.When summer ended, the Pilgrims had a good harvest of corn and barley.There was enough food to last through the winter.The Pilgrims decided to hold a celebration to give thanks for their harvest.Writings from that time say Pilgrim leader William Bradford set a date late in the year.He invited members of a nearby Indian tribe to take part.There were many kinds of food to eat.The meal included wild birds such as ducks, geese and turkeys.That thanksgiving celebration lasted three days.As the American colonies grew, many towns and settlements held thanksgiving or harvest celebrations.[共5题](1)Thanksgiving Day is originally celebrated by people for __________.(A)health(B)freedom(C)harvest(D)safety 你选择的答案： 前次作业时已经做对 [正确] 正确答案：C(2)Which of the following statements is TRUE about the passage?(A)Thanksgiving Day is a holiday celebrated by people all over the world.(B)Thanksgiving Day is a holiday with special religious significance only.(C)Thanksgiving Day is a holiday with a history of more than 300 years.(D)Thanksgiving Day is a holiday coming from Europe.你选择的答案： 前次作业时已经做对 [正确] 正确答案：C(3)Based on the passage, we can learn that __________.(A)American Indians were very brutal(B)the Pilgrims came to America to make friends with Indians(C)the Pilgrims came to America to look for new food(D)in England, the Pilgrims suffered cruel religious oppression 你选择的答案： 前次作业时已经做对 [正确] 正确答案：D(4)According to the passage, what happened to the Pilgrims during their first winter in America?(A)American Indians helped them plant crops.(B)Due to the cold and hunger, about 50 of them died.(C)They invited nearby Indians to have dinner together.(D)They began to raise ducks, geese and turkeys.你选择的答案： 前次作业时已经做对 [正确] 正确答案：B(5)The best title for the passage is __________.(A)The Origin of Thanksgiving Day(B)How to Celebrate Thanksgiving Day(C)The Tradition of Thanksgiving Day(D)The Significance of Thanksgiving Day 你选择的答案： 前次作业时已经做对 [正确] 正确答案：A 参考答案：

[第五单元];第5小题：

43.February 14th is a complicated but interesting holiday.First of all, St.Valentine’s Day is not a holiday from work.No one gets a day off.On Valentine’s Day people usually send romantic cards to someone they love or want to be loved by.The cards are called “valentines”.They are very colorful, often decorated with hearts, flowers, or birds, and have humorous or sentimental verses printed inside.The basic message of the verse is always “Be My Valentine”, “Be My Sweet Heart” or “Lover”.A valentine is often anonymous, or sometimes signed “Guess who”.The person receiving it has to guess who sent it.This can lead to interesting speculation.And that’s half the fun of valentines.One of the symbols of St.Valentine’s Day is the Roman god of Love, called Cupid.Cupid is often printed on the card;he is a winged infant, not wearing anything, poised to shoot his arrow into a heart.He would shoot an arrow of love into a person’s heart to make the person fall in love immediately, maybe with the first person to come along.Sometimes one arrow would go through two hearts, holding them together.So on February 14th not only do we have pictures of the Christian St.Valentine but we also have pictures of the non-Christian Cupid, the Roman god of Love.But it is from the Christians that we get the stories about St.Valentine’s Day that most people have come to believe.One story is about a Christian man whose name sounded something like “Valentine.” He lived around AD 250.At that time the Roman Emperor, Claudius II, refused to allow any Roman soldiers to get married for any reason whatsoever.Christian couples came to Valentine to be married.So Valentine would marry them in a Christian way.He was discovered and put in prison by the Emperor.One tradition says that he wrote notes to his friends by marking on leaves and then throwing them out the window of his prison.And the leaves were shaped like a heart.[共5题](1)St.Valentine’s Day is a holiday for __________.(A)people celebrating the new year’s coming(B)people fooling others(C)people getting a family reunion(D)people expressing love to their lovers 你选择的答案： 前次作业时已经做对 [正确] 正确答案：D(2)The word “anonymous” in the first paragraph means __________.(A)people do something by leaving false name(B)people do something by leaving no name(C)people do something by leaving real name(D)people do something by leaving nickname 你选择的答案： 前次作业时已经做对 [正确] 正确答案：B(3)Which of the following statements is NOT true according to the passage?(A)Valentine is a person’s name.(B)On Valentine’s Day, cards are usually used by people to express love.(C)On Valentine’s Day, everyone can take one day break from work to be with their lovers.(D)Cupid is often used to symbolize love.你选择的答案： 前次作业时已经做对 [正确] 正确答案：C(4)It can be inferred from the passage that __________.(A)the Roman Emperor, ClaudiusⅡ, was a Christian

(B)in spite of the Emperor’s prohibition, many people still held the desire for love(C)the Roman Emperor himself experienced a painful marriage(D)in Christianity, Cupid is the god of Love 你选择的答案： 前次作业时已经做对 [正确]

正确答案：B(5)The theme of this passage is to tell the readers __________.(A)what people should do on Valentine’s Day

(B)the reason people choose Cupid to be the symbol of Valentine’s Day

(C)the tradition people always follow on Valentine’s Day

(D)the origin and significance of St.Valentine’s Day 你选择的答案： 前次作业时已经做对 [正确] 正确答案：D 参考答案：

[第五单元];第5小题：

44.Using a public telephone may well be one of the minor irritations of life, demanding patience, determination and a strong possibility of failure, together on occasion with considerable unpopularity.The hopeful caller(shall we call him George?)waits till six o’clock in the evening to take advantage of the so-called “cheap rates” for a long-distance call.The telephone box, with two broken panes of glass in the side, stands at the junction of two main roads with buses, lorries and cars roaring past.It is pouring with rain as George joins a queue of four depressed-looking people.Time passes slowly and seems to come to a standstill while the person immediately before George carries on an endless conversation, pausing only to insert another coin every minute or so.Eventually the receiver is replaced and the caller leaves the box.George enters and picks up one of the directories inside, only to discover that someone unknown has torn out the very page he needs.Nothing for it but to dial directory Enquiries, wait patiently for a reply down the number given.At last George can go ahead with his call.Just as he is starting to dial, however, the door opens and an unpleasant-looking face peers in with the demand, “Can’t you hurry up?” Ignoring such barbarity, George continues to dial and his unwanted companion withdraws.At last he hears the burr-burr of the ringing tone, immediately followed by rapid pips demanding his money, but he is now so upset that he knocks down the coins he has placed ready on the top of the box.Having at last located them, he dials again: the pips are repeated and he hastily inserts the coins.A cold voice informs him, “Grand Hotel, Chalfont Wells.” “I’ve an urgent message for a Mr.Smith who is a guest in your hotel.Could you put me through to him? I’m afraid I don’t know his room number.”

The response appears less than enthusiastic and a long long silence follows.George inserts more coins.Then the voice informs him, “I’ve been trying to locate Mr.Smith but the hall porter reports having seen him leave about a minute ago.” Breathing heavily, George replaces the receiver, just as the knocking on the door starts again.[共5题](1)The main purpose of the passage is to provide __________.(A)instructions about how to use a public call box(B)advice about how to deal with public telephone problems(C)criticism of the efficiency of telephone system(D)an account of possible annoyances in using a public telephone 你选择的答案： 前次作业时已经做对 [正确] 正确答案：D(2)George can at least be thankful that __________.(A)the telephone itself is working(B)he can use the directory in the box to find the number(C)the call box is in a convenient position(D)he is able to give his message to the hotel receptionist 你选择的答案： 前次作业时已经做对 [正确] 正确答案：A(3)The reason for George having to dial a second time is that __________.(A)he has used up all the money(B)he can’t find the number he wants in the directory(C)he forgets to put the money in the box(D)he has got to find the money to put in the box 你选择的答案： 前次作业时已经做对 [正确] 正确答案：D(4)How is George feeling when he completes his call?(A)He is very disappointed at missing his family and friends.(B)He feels hard to control his annoyance.(C)He is angry with himself for being so stupid.(D)He is depressed at the thought of having to try again to get through.你选择的答案： 前次作业时已经做对 [正确] 正确答案：B(5)Which of the following is NOT true about “cheap rate”?

(A)People would like to use “cheap rate” to have a chat with a good friend in London.(B)People would like to use “cheap rate” to ask about a friend in hospital who has just had an operation.(C)People would like to use “cheap rate” to discuss the important project details with the colleagues.(D)People would like to use “cheap rate” to express Christmas greetings to cousins in Australia.你选择的答案： 前次作业时已经做对 [正确] 正确答案：C 参考答案：

[第五单元];第5小题：

45.The writers of murder stories go to a great deal of trouble to keep us guessing right up to the end.In actual fact, people often behave more strangely in real life than they do in stories.The following advertisement once appeared in a local newspaper: “An opportunity

to

earn 250∈afewminutes.Amanwhoiswill∈g→takechancesiswantedforanout-of-the-ord∈aryjobwhichcanbeperformedonlyonce.”Areaderfoundthisoffervery≥≠rousandapplied→theadvertiser,butabitsusπcious,hegaveafalsename.S∞nafterwards,hereceivedareply.Enclosed∈theenvelopewasatyped¬e∈struct∈ghim→r∈gacerta∈νmberifhewasstill∫erested.Hedidsoand≤arntonthete≤pho≠tt^headvertiserwantedhim→“≥tridofsomebody”andwoddiscussitmoreflywithhim≠xtday.Buttheman→ldthepoliceandomthenonactedundertheir∈structions.Thepolicesawthetwomenmeetandwatchedthemastheydroveaway→≥ther.Inthecartheadvertisercame→thep∮atonce:he→ldthemanhewantedhim→sh∞thiswife.Thereasonhegavewasth^ewassuffer∈goman∈curab≤diseaseandwanted→live∈awarmercountry,buthiswifeobjected→this.Giv∈gthemansomemo≠y,theadvertiser→ldhim→buyagunandwar≠dhim→becarefofthedogwhich,thoughitwod¬bite,mightaractaention.Healsogavehimapho→graphofhiswifesoth^ewodbeab≤→recognizeher.Aftert,^theadvertisersug≥stedtt^hemanshod“dothejob”≠xtmorn∈g.Meanwhi≤,hewodpreparehiswifebytell∈gherta^youngmanwasgo∈g→call.Aftertheμrder,theywodmeetaga∈outsidearailwaystationandthemo≠ywodbepaidasarran≥d.Thesecondmeet∈g≠ver→okplace,fortheadvertiserwasarrestedshortlyafterwardsandchar≥dwithaempt∈g→persuadesomeo≠→μrderhiswife.[共5题](1)Which of the following statements can best express the meaning of the opening sentence?(A)The murder stories often prefer to leave the doubtful points to the readers.(B)While reading, the readers can easily guess who is the real murderer.(C)The heroes in the stories meet with a lot of trouble.(D)Usually the stories show the readers who is the murderer at the very beginning.你选择的答案： 前次作业时已经做对 [正确] 正确答案：A(2)When a reader saw the advertisement __________.(A)he was sure he could get it(B)he could hardly believe it(C)he applied for the job with a false name(D)Both B and C 你选择的答案： 前次作业时已经做对 [正确] 正确答案：D(3)According to the passage, we CANNOT infer that __________.(A)the advertiser gave the man the first instruction through a letter(B)it was on the telephone that the man understood what the job was(C)the two men worked together to fulfill the plan(D)the man was scared when he knew what he was asked to do, so he reported the police at once 你选择的答案： 前次作业时已经做对 [正确] 正确答案：C(4)When the police received the report __________.(A)they arrested the advertiser at once(B)they sent a dog to keep watching on him(C)they didn’t arrest him until they got enough evidence(D)they arrested him after his wife was killed 你选择的答案： 前次作业时已经做对 [正确] 正确答案：C(5)What did the advertisement in a local newspaper provide?(A)An unusual job with a high pay.(B)A good job everyone wants to have.(C)A chance to be famous.(D)A large sum of money.你选择的答案： 前次作业时已经做对 [正确] 正确答案：A 参考答案：

[第五单元];第5小题：

46.Julie had turned 8 in October and as Christmas approached, Santa Claus was more and more __(1)__.During the week before Christmas, every night she announced to her father, “I know who really brings the presents.You do!” Then, __(2)__ a moment, she added, “Right?”

Jerry didn’t answer.__(3)__ he ________ I was sure she really wanted the truth.And we both were reluctant to give up Santa Claus ourselves.We got to tell Julie and her younger brother, Adam, to put out the cookies __(4)__ Santa was hungry.We __(5)__about the fire being out in the fireplace so he wouldn’t get burned.We issued a few threats about his list of good children and bad.It was all part of the tension and thrill of Christmas Eve – the night the fantasy comes true.And that fantasy of a fat jolly man who flies through the sky in a sleigh and arrives __(6)__ chimney with presents – that single belief says everything about the __(7)__ of children.How __(8)__ to lose it.For them and for us.So Jerry and I said nothing.Christmas Eve Julie appeared with a sheet of paper.At the top she had written, “If you are real, sign here.” It was, she said, a letter to Santa.She insisted that on this letter each of us – her father, Adam and I – __(9)__ the words ‘Santa Claus’, so if Santa were to sign it, she could compare our handwriting with his.Then she would know she __(10)__.[共10题](1)(A)on her mind(B)in her mind(C)at her mind(D)with her mind 你选择的答案： A [正确] 正确答案：A(2)(A)waited(B)had waited(C)had been waiting(D)waiting 你选择的答案： D [正确] 正确答案：D(3)(A)either „ or

(B)neither „ nor

(C)both „ and

(D)none „ of 你选择的答案： B [正确] 正确答案：B(4)(A)in case(B)in the case(C)in case of(D)in any case 你选择的答案： A [正确] 正确答案：A(5)(A)made a plan(B)made a joke(C)made a fuss(D)made a story 你选择的答案： C [正确] 正确答案：C(6)(A)from

(B)via(C)over(D)under 你选择的答案： B [正确] 正确答案：B(7)(A)innocent(B)innocence(C)innovate(D)innovation 你选择的答案： B [正确] 正确答案：B(8)(A)bearable(B)bearably(C)unbearable(D)unbearably 你选择的答案： C [正确] 正确答案：C(9)(A)wrote(B)had written(C)would have written(D)write 你选择的答案： D [正确] 正确答案：D(10)(A)had been tricked(B)was tricked(C)had not been tricked(D)was not tricked 你选择的答案： C [正确] 正确答案：C 参考答案：

篇6：第5次作业详解

一、单项选择题（本大题共40分，共 20 小题，每小题 2 分）1.世界上最大的CPU及相关芯片制造商是（）。A.Intel B.IBM C.Microsoft D.AMD

2.在工作中，若计算机的电源突然中断，则下列数据会丢失的是（）。A.RAM和ROM中的信息

B.RAM中的信息

C.ROM中的信息

D.RAM中部分的信息

3.在下列设备中，属于输出设备的是()A.硬盘

B.键盘

C.鼠标

D.打印机

4.数字锁定键是（）。A.Caps Lock B.Num Lock

C.Scroll Lock D.Pause

5.下列计算机部件中属于核心部件是（）A.CPU

B.显示器

C.硬盘

D.键盘

6.下列服务器中，安装了DNS服务器端软件提供DNS查询服务的是()。A.网络服务器

B.地址服务器

C.域名服务器

D.连接服务器

7.一个完整的计算机由()组成。A.硬件系统和软件系统

B.主机和显示器

C.主机、显示器和音箱

D.硬件系统和操作系统

8.安装操作系统后，还需要安装（）。A.软件和驱动

B.文件系统

C.应用程序

D.桌面

9.计算机故障排除过程中决定故障是否是全局性故障的关键是（）。A.软件

B.操作系统

C.网络

D.电源

10.计算机开机后CPU风扇转一会就停止，但电源风扇正常运行的原因可能包括（）。A.CPU风扇损坏

B.主板损坏

C.电源部分元件损坏导致供电不足

D.内存松动或损坏

11.一般的小型家庭或办公网络,要实现经济型的网络相连接的话,可以使用下述哪一种设备最方便实现网络共享（）。A.HUB B.网络交换机

C.宽带路由器

D.Modem

12.主板上的芯片组主要的组成部分包括（）。A.硬盘和软盘

B.显卡和声卡

C.不同的存储设备

D.北桥和南桥

13.联想笔记本安装声卡驱动的正确步骤是（）。①进入驱动“安装光盘”下载页面，寻找自己笔记本型号对应的驱动安装光盘进行下载 ②下载完成之后进入文件夹找到声卡驱动（Audio）点击进入 ③点击“Setup.exe”进行安装 ④进入联想官网驱动程序下载界面 A.①②③④

B.③②①④

C.②④①③

D.④①②③

14.双绞线是最普通的传输介质，由（）条相互绝缘的铜线组成.两根线绞接在一起是为了防止其电磁感应在邻近线对中产生干扰信号 A.2 B.4 C.6 D.8

15.CMOS通常是指计算机主板一块（）。A.只读ROM芯片

B.可读写的RAM芯片

C.PROM芯片

D.EPROM芯片

16.机械鼠标小球或滚轮太脏属于（）。A.电路或元器件损坏

B.机械故障

C.存储介质损坏

D.光电器件被污染

17.电话线线的连接头是（）。A.RJ-45 B.RJ-11 C.RJ-35 D.RJ-100

18.按下NUM LOCK锁定键灯亮小键盘不起作用原因是（）。A.键盘与主机未连接好

B.键盘内部与小键盘相关的电路开路或有虚焊的地方

C.NUM LOCK键有故障

D.Windows系统驱动有问题

19.下列措施中，有效防止软磁盘感染计算机病毒的是（）。A.软盘远离电磁场

B.定期对软磁盘作格式化处理

C.对软磁盘加上写保护

D.禁止与有病毒的其他软磁盘放在一起

20.在以太网中，双绞线使用与其他设备连接起来时使用的接口是（）。A.BNC接口

B.AUI接口

C.RJ-45接口

D.RJ-11接口

二、多项选择题（本大题共60分，共 20 小题，每小题 3 分）1.键盘可用于直接输入（A.数据

B.文本

C.程序和命令

D.图形、图像

2.下了设备中属于输入设备的有(A.键盘)）

B.鼠标

C.显示器

D.手写输入

3.下列设备可以作为输入设备的是（A.光驱

B.扫描仪

C.绘图仪

D.显示器

E.鼠标)

4.对于一台计算机而言，下列选项中不可或缺的设备包括（）。

A.显示器

B.键盘

C.鼠标

D.手写板

5.安装操作系统后，还需要安装（A.软件

B.日志

C.）。

驱动

D.应用程序

6.下列关于CPU说法正确的是（）。

A.CPU风扇安装不当，影响CPU的散热，在长时间的使用后，会大大缩短了CPU的寿命

B.CPU长时间处于超频状态对计算机没有任何影响

C.经常清灰和检查CPU风扇是否正常工作能延长CPU的使用寿命

D.安装或更换CPU时，一定要小心认真以防止针脚接触不良造成计算机无法启动

7.计算机CPU一般很难损坏。但是当CPU损坏后，可能表现出来的现象有（）。

A.计算机无法正常开机

B.机箱喇叭无鸣叫声

C.显示器没有信号

D.显示器花屏

8.下列关于计算机的知识，正确的有（）

A.外存储器中的信息不能直接进入 CPU 进行处理

B.系统总线是 CPU 与各部件之间传送各种信息的公共通道

C.光盘驱动器属于主机，光盘属于外部设备

D.家用电脑不属于微机

9.计算机故障的诊治一般进行检修的软件包括（）。

A.系统软件

B.驱动软件

C.应用软件

D.商业软件

10.计算机故障的诊治一般进行检修的软件包括（A.系统软件

B.驱动软件

C.应用软件

D.商业软件）。

11.刻录机有3个速度指标包括（）。

A.刻录速度

B.复写速度

C.扫描速度

D.读取速度

12.电脑硬盘的分区的类型包括（A.主分区

B.扩展分区

C.）。

逻辑分区

D.文件分区

13.计算机故障排除过程中，先软件后硬件原则指的就是，当您的电脑发生故障时，应该先从上来分析原因，排除该方面的原因后，再开始检查硬件的故障。（）

A.软件

B.操作系统

C.网络

D.硬件

14.下列关于笔记本的说法中正确的是（）。

A.笔记本计算机空间狭小、散热不好

B.使用笔记本计算机时要避免在高温的环境中长时间使用

C.笔记本可以长时间在过软的平台上使用

D.笔记本温度升高到一定程度时也可以不管它，照常使用

15.计算机在使用一段时间后，机箱内就会出现大量灰尘，如果不清理，可能出现的问题有（）。

A.没有影响

B.容易造成插槽上的硬件短路

C.导致计算机散热不良

D.使计算机运行速度变慢

16.Linux能运行主要UNIX工具软件或程序包括（）。

A.应用程序

B.网络协议

C.Linux工具

D.性能参数

17.计算机硬件日常维护是指在硬件方面进行维护，包括（A.计算机使用环境

B.计算机使用习惯

C.）。

计算机硬件设备的日常维护

D.计算机软件维护

18.选购硬盘时,主要参考的性能指标有（A.容量

B.转速

C.缓存大小

D.接口类型

19.下列哪些是常见的无线传输媒介（A.蓝牙

B.红外线）。）。

C.无线电短波

D.双绞线

20.计算机网络的资源共享功能包括（）。

A.硬件资源和软件资源共享

B.软件资源和数据资源共享

C.设备资源和非设备资源共享

D.硬件资源和数据资源共享

答案：

一、单项选择题（40分，共 20 题，每小题 2 分）

1.A 2.C 3.D 4.B 5.B 6.C 7.A 8.A 9.D 10.C 11.C 12.D 13.D 14.D 15.B 16.B 17.B 18.B 19.C 20.C

二、多项选择题（60分，共 20 题，每小题 3 分）