第一篇:北邮网络学院大学英语2阶段作业
一、阅读理解(共1道小题,共25.0分)
1.In the eighteenth century young ladies in Italy knew history and geography little.Once the French officer in Rome was giving a ball to which many important people were invited.The Italian Minister(大臣)came very late.A young lady, who knew him, saw him enter the ball-room and asked why he was so late.“Oh, nothing important,” answered the Minister.“Our head forgot to take his letters with him and went back to his hotel to bring them.If he had left them in Brazil we should have had to wait at least six months for them.” “Is Brazil so far from Rome?” asked the lady, who knew very little geography.“It is in the New World,” said the Minister.“In the New World?” repeated the lady in great surprise.“Yes, in the New World, which was discovered by Christopher Columbus.” When the young lady heard this, she rushed into the middle of the ball-room and shouted as loud as she could: “Ladies and gentlemen, have you heard the latest news? A new world has just been discovered by a certain Christopher Columbus.” 1.Why was the Minister late? A.The head left his letters in Brazil.B.He had a traffic accident.C.The head had to go back to Brazil.D.The head left his letters in the hotel.2.Where did the head leave his letters? A.In the hotel.B.In Brazil.C.In his office.D.In Rome 3.Why did the young lady shout? A.She wanted to tell the surprising news.B.She was the hostess of the ball.C.She knew the Minister.D.She had never heard about Columbus.4.Her shouting showed she was______.A.clever B.lack of knowledge C.thoughtless D.knowledgeable 5.The best title for the passage is ______.A.The New World B.Surprising News C.An Ignorant Italian Woman D.Christopher Columbus
试题分值:25.0 得分:[5, 5, 5, 5, 5] 提示:[1]D.细节题。本题问“为什么大臣迟到了?”中心词是“Minister late”。答案在第三段。该段大意是“‘哦,没什么严重的事情’大臣回答道。‘我们上司忘记带信了,所以他就回宾馆取信去了。如果他把信件遗留在巴西的话,那我们可要等上至少六个月了。’”据此,可知本题答案是D。
[2]A.细节题。本题问“那个大臣的上司把信忘记在什么地方了?”中心词是“head”和“letters”。答案在第三段,该段大意请参考第一题。答案是A。
[3]A.细节题。本题问“为何那个年轻女士叫了起来?”中心词是“the young lady shout”。答案在最后一段,该段大意是“女士们、先生们,你们听说了最新的消息了吗?一个叫哥伦布的人不久刚发现了一个新世界。”据此,可知答案是A(她想告诉大家这个惊人的信息)。B的意思是“她是舞会的女主人”,C的意思是“她认识那个大臣”,D的意思是“她从没听说过哥伦布”。[4]B.推断题。本题问“她的叫喊表明她_______。”推断题一般需要我们先浏览一下选项。A的意思是“聪明的”,B的意思是“知识缺乏的”,C的意思是“无思想的,笨的”,D的意思是“有见识的”。根据第三题的解释我们可以看出这名女士对哥伦布发现新大陆(新大陆是15世纪末发现的,而本文的背景是18世纪)的这种大事都不知道,可见其缺乏知识。据此,答案是B。
[5]C.中心思想题。本题让我们给文章选个最好的标题。我们可以先浏览每个段落的第一句话。第一段就是一句话,该句大意是“十八世纪的意大利少女,她们的历史知识、地理知识一般来说非常贫乏。”读到这里,我们应该可以知道这样的一个句子明显就是文章大意的概括,所以题目就要和此相关。当然,你也可以再继续读几段,你会发现文章出现了一名女士和一位意大利大臣之间的对话。最终,我们选择C(一个无知的意大利女性)。
二、单项选择题(共15道小题,共75.0分)
1.The prospect of working under a woman_________ the ultimate indignity.A.formed B.came C.constituted D.composed 知识点: 第一部分 学生答[C;] 标准答案: 案: 得分: [5] 试题分值:
C;5.0 该题选C,题目大意是“在一个女人手下干活,就觉得是最大的侮辱。”
提示: constitute:及物动词 vt.构成,组成
This move constitutes an act of aggression.这一举动构成了侵略行为。
2.3.Being _________ money and wanting to do something useful, I applied.A.short of B.short for C.1ack of D.slim of 知识点: 第一部分
A;5.0 学生答[A;] 标准答案: 案: 得分: [5] 试题分值: 该题选A,题目大意是“我因为手头很拮据,同时也想干点有用的事,于是便提出了申请。” be short of:有“缺少„„”之意
1.We´re short of cash.我们的资金不足
提示: 2.The rebels were short of gunpowder.反叛者们缺少弹药。
3.Otherwise you´ll be short of money all term.否则你真个学期都将缺钱。
4.5.The evergreen shrubs struggled to _________ the dust and fumes from the busy main road.A.live B.survive C.fight D.resist 知识点: 第一部分
B;5.0 学生答[B;] 标准答案: 案: 得分: [5] 试题分值: 该题选B,题目大意是“这些冬青灌木经受着从繁忙的大街一吹来的尘烟,挣扎着活下去。” survive: 及物动词 vt.1.在...之后仍然生存,从...中逃生
Only two passengers survived the air-crash.提示: 这次飞机失事只有两名乘客幸免于死。
2.比...活得长;丧失(配偶,亲人等)She survived her husband by twenty years.她丈夫去世后她又活了二十年。不及物动词 vi.活下来,幸存;残留 Few survived after the flood.洪水后极少有人生还。6.7.It _________an awkward journey.A.tested B.verified C.proved D.turned 知识点: 第一部分 学生答[C;] 案: 得分: [5]
标准答案: 试题分值:
C;5.0 该题选C,题目大意是“这上路去那儿原来还真麻烦。”
prove:及物动词 vt.1.证明,证实
I´ll prove to the world that he was right.提示: 我将向世人证明他是对的。
The lawyer proved the innocence of his client.律师证实了他的当事人的清白。2.表现,显示
She has proved herself unreliable.她的表现说明她靠不住
8.9.Bill has ________ to Beijing University for a teaching assistantship, but his chances of getting it are slim.A.proved B.attached C.applied D.asked 知识点: 第二部分
C;5.0 学生答[C;] 标准答案: 案: 得分: [5] 试题分值: 该题选C,题目大意是“比尔已向北京大学申请助教职位,但他得到它的可能性很小。” apply to的宾语在内容上应当是对之做出申请的提示: 个人或机构,例如大学(university, college)。The young girl applied to the company for a job.女孩向这家公司就职。
10.11.When he came down to breakfast, he was ________ the pleasure of a new, great discover.A.full of B.filling C.satisfied with D.beaming with 知识点: 第一部分
D;5.0 学生答[D;] 标准答案: 案: 得分: [5] 试题分值: 该题选D,题目大意是“当他下楼来吃早餐时,他正因为一个新的大的发现而快乐。” beam with:堆满笑容,眉开眼笑
提示: Upon hearing the good news he beamed with joy.一听到这个好消息,他高兴得 眉开眼笑。12.13.The razor and water ________ the job.A.act B.do C.perform D.function 知识点: 第一部分 学生答[B;] 案: 得分: [5] 提示:
标准答案: 试题分值:
B;5.0 该题选B,题目大意是“这把剃须刀与水一起就可以了。”
14.15.Seen ________ the eyes of a young friend Einstein was a simple,modest and ordinary man.A.upon B.through C.with D.in 知识第一部分 点: 学生答[B;] 标准答案: 案: 得[5] 试题分值: 分:
B;5.0 该题选B,题目大意是“在一个年轻的朋友的眼里,爱因斯坦是一个朴素、谦虚而普通的人。”
句首的Seen是过去分词,引出一个过去分词短语,在句中作状语。
过去分词作状语应注意,过去分词与句子主语之间的关系
过去分词作状语表示被动或完成的动作。过去分词提与句子主语之间通常存在逻辑上的动宾关系。如: 示: Grown in rich soil, these seeds can grow fast.种在肥沃的土壤里,这些种子能长得很快。
分词在句子中作状语,分词的逻辑主语与句子的主语一致。使用何种分词,要取决于分词与句子主语之间的关系:主谓关系用现在分词,动宾或被动关系用过去分词。比较:
Seen from the sky, our city is very beautiful.(our city与see之间是被动关系)Seeing from the sky, we find our city is very beautiful.(we与see之间是主谓关系)16.17.There were still situations__________ which I couldn't be certain my decision had been the right one.A.upon B.on C.in D.with 知识点: 第一部分 学生答[C;] 标准答案: 案: 得分: [5] 试题分值:
C;5.0 该题选C,题目大意是“在有些情况下我仍然不能确定自己的决定是否正确。”
提示: situation:名词 n.处境,境遇
He is in a difficult situation.他处境困难。
18.19.This is the first time I've attended such a big party.That is why I am not __________.A.at easy B.with ease C.at ease D.at loose 知识点: 第二部分
C;5.0 学生答[C;] 标准答案: 案: 得分: [5] 试题分值: 该题选C,题目大意是“这是我第一次参加这么大型的聚会,所以我感到很拘谨。” at ease:舒服的;自在地;不拘束
1.The sergeant gave his men the command “At 提示: ease!” 上士向他的士兵发出口令:“稍息!”
2.The retired old worker is living at his ease.这位退休工人的生活过得很舒服。
3.His manner was so bright and pleasant that Arthur felt at ease with him at once.他的态度这样爽朗愉快,亚瑟立刻觉得和他在一起没有什么拘束。
20.21.She was made ___________ us everything.A.telling B.told C.to tell D.tell 知识第二部分 点: 学生[C;] 标准答案: 答案: 得分: [5] 试题分值:
C;5.0 该题选C,题目大意是“我们让她说出了一切。” 英语中有些动词,如:make, see, feel, hear, observe等在主动语态中其宾语不带to的不定式结构,但在被动语态中,需用带to的不定式。1.They made us wait for a long time.(We were 提示: made to wait for a long time.)他们让我们等了很长时间。
2.People saw the robber enter the bank.(The robber was seen to enter the bank.)人们看见劫匪进了银行。
22.23.Self-confidence ensures the doctor that the decision he is going to make is ____________.A.sound B.alive C.sensitive D.loud 知识点: 第二部分 学生答[A;] 标准答案: 案: 得分: [5] 试题分值:
A;5.0 提示: 该题选A,题目大意是“自信心保证了医生对于他将做出的决定是正确合理的。”
sound:形容词 a.正确的,合理的,明智的 1.He gave sound and practical advice.他提出了合理而正确的建议。
2.The lawyer presented a sound argument.律师拿出了理由充足的论据。
24.25.Mr.Smith is going to be ____________ as a lawyer.A.on practice B.in practice C.with practice D.at practice 知识第二部分 点: 学生[B;] 标准答案: 答案: 得分: [5] 试题分值:
B;5.0 该题选B,题目大意是“史密斯将开业作律师。” in practice:while performing one’s skills(医师,律师等)在开业中
1.My elder brother is in practice as a doctor.提示: 我哥哥在行医。
2.Someday when you are out in practice as a lawyer, you will thank me for my advice.有一天你出去做律师了,你会感激我今天给你的劝告的。
26.27.The committee has been __________ my letters for three months.A.going on B.working on C.studying for D.sitting on 知识点: 第二部分
D;5.0 学生答[D;] 标准答案: 案: 得分: [5] 试题分值: 提示: 该题选D,题目大意是“委员会把我的信已经搁置了三个月了。”
sit on:delay taking action on;do nothing about 拖延;搁置;忽略
1.sit on the suggestion拖延这项建议
2.They have been sitting on my application for a whole month.他们把我的申请整整压了一个月了。
28.29.The doctor decided to _________ Tom’s stomach to remove the tumor.A.open B.open up C.turn up D.light up 知识点: 第二部分
B;5.0 学生[B;] 标准答案: 答案: 得分: [5] 试题分值: 该题选B,题目大意是“医生决定给汤姆的胃开刀,切除肿瘤。”
open up:cut open切开;给„开刀
提示: 1.open up his stomach 给他的胃开刀
2.I want a famous doctor to open me up, because it’s safe.我想让一个有名的大夫帮我开刀,因为这样安全些。30.
第二篇:北邮网络学院工程数学阶段作业四
一、判断题(共5道小题,共50.0分)
1.设随机变量X与Y独立,则A.正确 B.错误
知识点: 阶段作业四 学生答[B;] 案: 得分: [10] 2.设A.正确 B.错误
知识点: 阶段作业四 学生答[A;] 案: 得分: [10]
3.设随机变量X与Y独立,则X与Y的相关系数A.正确 B.错误
知识点: 阶段作业四 学生答[A;] 案: 得分: [10]
.,则,.
.
试题分
10.0
值:
试题分
10.0
值:
试题分
10.0
值: 4.设(X,Y)的概率密度A.正确,则常数. B.错误
知识点: 阶段作业四 学生答[A;] 案: 得分: [10] 5.(错误)
试题分
10.0
值: 设(X,Y)的概率密度为独立.
A.正确 B.错误
知识点: 阶段作业四 学生答[A;] 案: 得分: [0],则X与Y相互
试题分
10.0
值:
二、单项选择题(共5道小题,共50.0分)
1.设X与Y的相关系数差,,则X与Y的协方().
A.-7.2 B.-1.8 C.-1.2 D.-0.18 知识点: 阶段作业四 学生答[C;] 案: 得分: [10]
试题分
10.0
值: 2.设随机变量X ~U[1,3],则().
A.B.C.D.知识点: 阶段作业四 学生答[A;] 案: 得分: [10] 3.(错误)设,如果,则X的分布列
试题分
10.0
值:().
A.B.C.D.知识点: 阶段作业四 学生答[C;] 案: 得分: [0]
试题分
10.0
值: 4.设随机变量X的概率密度为().
A.B.C.D.知识点: 阶段作业四 学生答案: [B;]
得分: [10] 试题分
值:
5.设随机变量X的分布列为
则().
A.1.7 B.2.3 C.-2.3 D.-1.7 知识点: 阶段作业四 学生答案: [A;],则D(X)=
10.0
得分: [10]
试题分
10.0
值:
第三篇:北邮网络学院工程数学阶段作业二
一、判断题(共5道小题,共50.0分)
1.若线性方程组阵满足Rank(A.正确 B.错误
知识点: 阶段作业二 学生答[B;] 案: 得分: [10] 2.若向量组
中的线性相关.
A.正确 B.错误
知识点: 阶段作业二 学生答[A;] 案: 得分: [10] 3.若向量组A.正确 B.错误
知识点: 阶段作业二 学生答[B;] 案:
线性相关,则
一定可用
可用 的系数矩阵A和增广矩)=Rank(A),则此方程组有唯一解.
试题分
10.0
值:
线性表示,则
试题分
10.0
值:
线性表示. 得分: [10] 4.若与A.正确 B.错误
知识点: 阶段作业二 学生答[A;] 案: 得分: [10] 5.若存在线性无关.
A.正确 B.错误
知识点: 阶段作业二 学生答[B;] 案: 得分: [10] 6.试题分
10.0
值:
是向量组
等价. 的一个极大无关组,试题分
10.0
值:
使式子成立,则向量组
试题分
10.0
值:
二、单项选择题(共5道小题,共50.0分)
1.(错误)若线性方程组阵满足Rank(的系数矩阵A和增广矩)=Rank(A)= n,则此方程组().
A.无解
B.有唯一解 C.有无穷多解
D.不能确定是否有解 知识点: 阶段作业二 学生答[C;] 案: 得分: [0] 2.(错误)
试题分
10.0
值: 当k =()时,线性方程组A.0或1 B.1或-1 C.-1或-3 D.-1或3 知识点: 阶段作业二 学生答[A;] 案: 得分: [0]
有非零解.
试题分
10.0
值: 3.设向量组,则实数t()时,线性无关. A.≠-3 B.≠-2 C.=-2 D.=-3 知识点: 阶段作业二 学生答案: [B;]
得分: [10] 试题分
值:
10.0 4.设向量,,则向量 可由向量
线性表示的表达式为
().A.B.C.D.知识点: 阶段作业二 学生答案: [B;]
得分: [10] 试题分
值:
10.0
5.设矩阵的行向量组,线性无关,则
(A.0 B.1 C.2 ,).
D.3 知识点: 阶段作业二 学生答[D;] 案: 得分: [10] 6.试题分
10.0
值:
第四篇:2015北邮远程教育大学英语阶段2作业
一、阅读理解(共1道小题,共25.0分)
1.One day in 1965, when I was a library worker at school, a teacher came to me.She had a student who finished his work before all the others and needed something more difficult for him to do.“Could you help me in the library?” she asked.I said, “Send him along.”
Soon, a golden-haired boy appeared.“Do you have a job for me?” he asked.I told him about a system for sorting books.He picked up the idea immediately.Then I showed him some cards for some unreturned books that though had been returned but not recorded.Maybe some books were put on wrong places.He said, “Is it a kind of a detective job?” I answered yes, and then began his work.He had found three books with wrong card by the time his teacher opened the door and said, “Time for rest!” he argued for finishing the finding job, but the teacher won.The next morning, he arrived early, “I want to finish these books,” he said.At the end of the day, when he asked to work with me more often, it was easy for me to say yes.After a few weeks I found a note on my desk, inviting me to dinner at the boy’s home.At the end of a pleasant evening, his mother declared that the family would be moving to another school area.Her son’s first concern, she said, was leaving the library.“Who will find the lost books?” he asked.When the time came, it was hard to say goodbye.Though at the beginning he had seemed an ordinary boy, his strong feeling of interest had made him different.Do you know who he is? This boy became a great man of the information age: Bill Gates.2.1.Why did the teacher go to the library to find a job for Bill Gates?
2.1.2.3.4.Because the teacher found the librarian quite busy.Because Bill Gates wanted to find a job.Because Bill Gates finished his study quickly and had more free time than the others.Because the library needed a new worker.3.What do you know from the passage?
4.1.2.3.4.Library work was very difficult for Bill Gates.Bill Gates did his job without any difficulty.The librarian was too busy to have a rest.His mother hoped that Bill Gates would stay for his job.1.The sentence “He picked up the idea immediately” means that_____.2.1.2.3.4.he learned that system quickly he collected that system quickly he lifted up that system quickly he improved that system quickly 1.What was Bill Gates expected to do in the library?
2.1.2.3.4.Finding the lost cards.Learning the system.Helping the worker with everything in the library.Finding books with wrong cards.1.How did Bill Gates feel when his family would move to another school area?
2.1.2.3.4.Sad.Pleasant.Worried.Interested.试题分值:25.0
得分:[5, 5, 5, 5, 5] 提示:[1]C.细节题。本题问“为何那位老师要去图书馆给Bill Gates找工作?”中心词是“the teacher”和“the library”。答案在第一段的第二句,该句大意是“She had a student who finished his work before all the others and needed something more difficult for him to do.这名老师有一个学生,这个学生比别的学生提前完成功课,需要找一些难一点的事情来做。”据此可知答案是C。
[2]B.中心思想题。本题问“你从文章中可以得知什么?”解决这种题目,我们首先要浏览一下选项的大意。A的意思是“对Bill Gates来说,图书馆的工作太难了。”B的意思是“Bill Gates毫不困难地就完成了图书馆的工作。”C的意思是“那名图书管理员太忙了,都没有时间休息。”D的意思是“Bill Gates的母亲希望他能够留下来继续做这份工作。”接着,我们要对每一个选项进行判断。第二段的第四句话告诉我们,Bill Gates很快就领会了那位图书管理员的意思。据此可见A是错误的,B是正确的。文章并没有说那名图书管理员忙得都没法休息,所以C是错误的。文章的倒数第二段告诉我们,Bill Gates一家都要搬到外地,Bill Gates的妈妈并没有要求儿子独自留下来。据此可知D也是错误的。
[3]A.句义理解题。本题问我们“He picked up the idea immediately ”这句话是什么意思。A的意思是“他快速的学会了图书馆的系统。”B的意思是“他快速的收集了图书馆的系统。”C的意思是“他快速地举起了图书馆的系统。”D的意思是“他快速地改善了图书馆的系统。” 根据上面第二题的解释,我们已经知道这个句子的意思是A。
[4]D.细节题。本题问“Bill Gates在图书馆里要做什么事情?”中心词就是“the library”,经过定位我们会发现答案在第二段。该段中间几句大意是“我又给他看了一些未归还书的书卡,其实这些书已经还回来了,但是当时并没有做记录。也许其中一些被放在错误的地方了。”据此,可知答案是D(Bill Gates要利用这些书卡找到那些书。)
[5]C.细节题。本题问“Bill Gates对于自己家要搬到另一个校区有什么感受?”中心词是“another school area”。答案在倒数第二段,该段大意是“几周之后,我在办公桌上发现了一张纸条,孩子一家邀请我去共进晚餐。在共度了一个美好夜晚之后,孩子的母亲告诉我说他们一家将会搬到另一个校区。她说孩子最关心的就是要离开图书馆了。孩子会问,‘谁来找那些丢失的书呢?’分手时,我们真的是难舍难分。虽然在开始的时候,这个孩子似乎很平常,但是他做事情的那种强烈的兴趣使得他与众不同。”据此可见Bill Gates的感觉是C(担忧的)。
二、单项选择题(共15道小题,共75.0分)
1.Trying to make some money before entering university,the author _________ a teaching job.2.1.2.3.4.applies to applies for demands for asks for
知识点: 第一部分 学生答[B;] 案: 得分: [5]
标准答
B;
案:
试题分
5.0
值: 提示: 该题选B,题目大意是“进入大学之前,尽力去攒一些钱。作者申请了一个教书职业。” apply for:请求得到
1.He applied for the job.他申请取得这份工作。
2.I want to apply for the scholarship of this school.我想申请这所学校的奖学金。注:apply for与apply to的区别
apply for 的宾语在内容上应当是希望获得的事物,例如奖金(reward),签证(visa),贷款(loan, credit), apply to的宾语在内容上则应当是对之作出申请的个人或机构,例如大学(university, college)。apply to 后接人,表示“向谁申请”。
We applied to them for help.我们向他们求援。
apply sth to sth 是指把某某物应用在某某上,比如说:
We can apply this new technology to our new product 我们能把这项新技术用在我们的新产品上。
3.(错误)He looked at me with _________ of surprised disapproval.4.1.2.3.4.a looking
an appearance a feature an air
知识点: 第一部分 学生答[B;] 案: 得分: 提示: [0]
标准答
D;
案:
试题分
5.0
值:
该题选D,题目大意是“他带着一种吃惊的、不以为然的神态看着我。” air:名词 n.1.空气;大气
Better let in some fresh air.最好放些新鲜空气进来。2.天空,空中
The air was full of butterflies.天空中飞舞着许许多多蝴蝶。3.样子,神态
He came into the room with an air of importance.他带着一副了不起的神情走进室内。4.气氛
There was an air of mystery in the house.屋内有种神秘的气氛。
1.I arrived on a hot June morning _________ depressed _________ feel nervous.2.1.2.3.4.too...to so...that as...as too...that
知识点: 第一部分 学生答[A;] 案: 得分: [5]
标准答
A;
案:
试题分
5.0
值:
提示: 该题选A,题目大意是“我在六月一个炎热的上午到了那儿,因为心情非常沮丧,竟不感到紧张了。”
too...to:“太„„以至于不能„„”(否定句型)
1.The boy is too young to go to school.这个男孩太小了,还不能上学。
2.She runs too slow to catch up with me. 她跑得太慢追不上我。
3.I´m too busy to write to my family often.我太忙而不能经常跟家里写信。4.I love you too much to leave you for a minute.我太爱你,一刻也离不开你。
1.It _________an awkward journey.2.1.2.3.4.tested verified proved turned
知识点: 第一部分 学生答[C;] 案: 得分: [5]
标准答
C;
案:
试题分
5.0
值:
提示: 该题选C,题目大意是“这上路去那儿原来还真麻烦。”
prove:及物动词 vt.1.证明,证实
I´ll prove to the world that he was right.我将向世人证明他是对的。
The lawyer proved the innocence of his client.律师证实了他的当事人的清白。2.表现,显示
She has proved herself unreliable.她的表现说明她靠不住
1.Before liberation, many laboring people were _________ food and clothes.2.1.2.3.4.enough of lack share of short of 知识点: 第二部分 学生答[D;] 案: 得分: [5]
标准答
D;
案:
试题分
5.0
值:
提示: 该题选D,题目大意是“解放前广大劳动人民缺吃少穿。”
short of:①缺少,不是 ②达不到
③主要没有„„,只要不„„
1.We’ll never stop short of goal.达不到目的,我们决不罢休。
2.Short of delay, well certainly finish the work in time.只要不耽搁,我们一定能按时完成任务。
3.Short of replacing hardware, you cannot recover from this situation.缺乏可替换硬件,将不能从这种情况中恢复。
1.He never did work ________ the solution.2.1.2.3.4.out with forth to
知识点: 第一部分 学生答[A;] 案: 得分: [5]
标准答
A;
案:
试题分
5.0
值:
提示: 该题选A,题目大意是“他从没有说清这个原理。”
work out:固定词组 ph.1.想出;制订出;产生出
work out a program 制订计划 2.解决;确定
Can you work out on the map where we are now? 你能在地图上找到我们现在所在的位置吗?
1.When he came down to breakfast, he was ________ the pleasure of a new, great discover.2.1.2.3.4.full of filling
satisfied with beaming with
知识点: 第一部分 学生答[D;] 案: 得分: [5]
标准答
D;
案:
试题分
5.0
值:
提示: 该题选D,题目大意是“当他下楼来吃早餐时,他正因为一个新的大的发现而快乐。” beam with:堆满笑容,眉开眼笑
Upon hearing the good news he beamed with joy.一听到这个好消息,他高兴得 眉开眼笑。
1.He was the only person I knew who had come to ________with himself and the world around him.2.1.2.3.4.terms words relations
conversations
知识点: 第一部分 学生答[A;] 案: 得分: [5]
标准答
A;
案:
试题分
5.0
值: 提示: 该题选A,题目大意是“他是我认识的所有的这样的人中的一个,他承认他自身的有限性并与他周围的世界和平相处。” come to turns with:accept something one does not want to accept达成协议;与„妥协;和解;让步
1.come to terms with the workers与工人达成妥协
2.He found it difficult to come to terms with his son’s death.他发现很难正视儿子已死去的现实。
3.It took John a long time to come to terms with the fact that he would no longer be able to go sailing again.过了相当长的一段时间,约翰才不得不承认这样一个现实:他不能再去航海了。
1.This all__________ conceited and I guess it is----but a surgeon needs conceit.2.1.2.3.4.sound hears sounds listens
知识点: 第一部分 学生答[C;] 案: 得分: [5]
标准答
C;
案:
试题分
5.0
值:
提示: 该题选C,题目大意是“这些话听上去很自负,而且我以为这的确是自负――但外科医师就是需要这种自负。”
sound:不及物动词 vi.听起来,听上去
The music sounds very pleasing to the ear.这音乐听起来十分悦耳。
1.With my knowledge and experience,I knew any decision I' d made was __________to be a sound one.2.1.2.3.4.bind sound round bound
知识点: 第一部分 学生答[D;] 案: 得分: [5]
标准答
D;
案:
试题分
5.0
值:
提示: 该题选D,题目大意是“我知道,凭我的知识和经验,我做出的任何决定肯定都是稳妥的。” sound:形容词 a.合理的,明智的
1.I acted on her sound advice.我按她的忠告去做了。
2.Give yourself a sound reason when making decisions.做决定之前要给自己一个合理的理由。
1.Once I had made a__________ decision,I no longer dwelt on it.2.1.2.3.4.considering considered thinking thought
知识点: 第一部分 学生答[B;] 案: 得分: 提示: [5]
标准答
B;
案:
试题分
5.0
值:
该题选B,题目大意是“我一旦经过深思熟虑做出某个决定,就不再去多想它了。” considered:考虑过的;经过深思熟虑的 He hoped that the committee would think about his considered opinion.他希望委员会能考虑他经过深思熟虑后提出的意见。
1.Computer is _________ storing millions of bits information.2.1.2.3.4.capable of convert to receive resort to
知识点: 第二部分 学生答[A;] 案: 得分: [5]
标准答
A;
案:
试题分
5.0
值:
提示: 该题选A,题目大意是“计算机能储存数百万条信息。”
capable of:有„能力的;有„本领的 1.Susan is capable of hard work.苏珊能胜任艰苦的工作。
2.I want to be part of a team that´s capable of doing great things.我想成为球队的一份子,共创大业。
3.At critical moments the engineer should be capable of facing all difficulties.在关键时刻,工程师应该有能力面对一切困难。
1.The doctor suggested that Mike ___________ in hospital until he was fully recovered.2.1.staying 2.stay 3.stayed 4.was staying 知识点: 第二部分 学生答[B;] 案: 得分: [5]
标准答
B;
案:
试题分
5.0
值:
提示: 该题选B,题目大意是“医生建议迈克继续住院直到完全康复。” suggest that...建议
注意:这是从句中用虚拟语气,即:从句谓语形式是“(should)+ 动词原形”,should多数情况可以省略,只留动词原形。如:
1.I suggested that we(should)go home.我建议我们回家。
2.The dentist suggested that she(should)come another day.牙医建议她改天再来。3.We suggested that he(should)go and make an apology to his teacher.我们建议他去向老师道歉。
4.She suggested that the class meeting(should)not be held on Saturday.她建议班会不要在星期六举行。
1.During the interview, the coach said he was _________ on his team’s winning the game.2.1.2.3.4.failed unable confident dwell
知识点: 第二部分 学生答[C;] 案: 得分: 提示: [5]
标准答
C;
案:
试题分
5.0
值:
该题选C,题目大意是“在采访过程中,教练说他很自信他的球队能获胜这场比赛。” confident:形容词 a.确信的;有信心的,自信的
1.He is quite confident that he will pass the examination.他很有信心通过考试。2.They are confident of success.他们有信心能够成功。
3.He is confident of passing the examination.他有信心通过考试。
4.Patrick was confident of his ability to get work for himself.派屈克自信有能力为自己找到工作。
1.You must _________ the fact that you are no longer as strong as you were.2.1.2.3.4.live on live in live with live up
知识点: 第二部分 学生答[C;] 案: 得分: [5]
标准答
C;
案:
试题分
5.0
值:
提示: 解析:该题选C,题目大意是“你必须接受这样的事实,即:你的身体已不如从前那么强壮了。” live with:accept(sth.unpleasant);to tolerate容忍;接受;学会适应 1.The air pollution in our city is terrible, but we have to live with it.我们城市空气污染的非常厉害,但我们还得忍着。
2.You must live with the fact that you’re no longer as rich as you were.Your family has come down in the world.你必须接受这样的事实,你已不再富有,你已经家道中落了。
第五篇:北邮网络学院光钎通信阶段作业四
一、单项选择题(共5道小题,共100.0分)
1.阶跃型光纤,若n1=1.5,相对折射指数差Δ=0.018,试计算:(1)纤芯与包层之间的临界角θc=___________;(2)数值孔径NA=___________。
A.79.110、0.28 B.79.110、0.54 C.11.890、0.28 D.11.890、0.28 知识点: 光纤计算 学生答[A;] 案: 得分: [20] 提示:
2.阶跃型光纤中,已知纤芯折射率n1=1.51, n2=1.49,纤芯半径a=4μm,工作波长λ=1.31 μm。计算可得(1)归一化频率V=__________;(2)每公里长度光纤的模式色散Δτ=__________秒。
A.6.78、6.54×10-11 B.6.78、6.54×10-8 C.4.67、6.54×10-11 D.4.67、6.54×10-8
知识点: 光纤计算 学生答[A;] 案: 得分: [20] 提示:
3.计算STM-1帧结构中段开销SOH的容量(速率)=__________Mb/s。
A.4.608 Kb/s B.4.608 Mb/s C.15.336 Kb/s D.15.336 Mb/s
标准答
A;
案:
试题分
20.0
值: 标准答
A;
案:
试题分
20.0
值: 知识点: SDH计算 学生答[B;] 案: 得分: [20] 提示:
4.有622.080Mbit/s速率的单模光缆传输系统,应用InGaAs-LD,其It<50mA,标称波长为1310nm,光谱宽度为2nm。接收灵敏度为-28dBm, 动态范围≥20dB。采用的光缆其固有损耗为0.3dB/km, 接头损耗为0.1dB/km,光连接器(收、发各一个)衰减为1dB,光纤色散系数≤1.8ps/nm・km, 光纤富余度为0.1dB/km。若考虑1dB色散代价(ε取0.306),5dB设备富余度,则当损耗受限的最大中继距离为40km时,系统所需的出纤功率为__________dBm;根据系统参数,色散受限中继距离为__________。
A.0.1、136.6km B.1、80km C.0、136.6km D.10、80km 知识点: 中继距离计算 学生答[C;] 案: 得分: [20] 提示:
5.若一个2.5Gbit/s单模光缆通信系统,其系统总体要求如下: 系统中采用的激光器为单纵摸激光器,其阈值电流小于50mA,激光器工作于1550nm.光脉冲谱线宽度Δλ
max
标准答
B;
案:
试题分
20.0
值:
标准答
C;
案:
试题分
20.0
值:
≤1.8nm。发送光功率PT=2.5dBm。如用高性能的光接收组件,可在BER=1×10-10条件下得到接收灵敏度PR=-38dBm,动态范围D≥20dB。
若考虑光通道功率代价PP =1dB,光连接器衰减AC=1dB(发送和接收端各一个),光纤接头损耗AS=0.1dB/km,光纤固有损耗α=0.23dB/km,光纤色散系数D≤2.2ps/(km・nm)取ME=3dB MC=0.1dB/km,频率啁啾系数为3.2。试计算损耗受限中继距离为__________,色散受限中继距离为__________,则最大中继距离为__________。
A.80km、74km、74km B.74km、67.5km、67.5km C.74km、67.5km、74km D.80km、675km、80km 知识点: 中继距离计算 学生答案: [D;] 得分: [20] 提示:
标准答
案:
试题分
值:
D;
20.0