中石油北京大学英语二--第二阶段在线作业

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大学英语二模拟二

北京语言大学网络教育学院《大学英语二》模拟试卷二第I卷（客观卷）1. Studies have shown _______ teenagers often suffer form depressionA. thatB. whichC. in which D．in that2. The party has failed to _______ the majority of voters that it is capable of governing the country.A. trustB. creditC. convinceD. believe3. Many of us visited the industrial exhibition, __________, to our disappointment, we saw very few high-tech products.[A] where [B] which [C] as [D] that4. The kids are _______ be hungry when they get home.[A] obliged to [B] bound to [C] desired to [D] motivated to5. All the characteristics that distinguish birds _______ other animals can be traced to prehistoric times.A. toB. betweenC. forD. from6. Management often works hard to set up a situation work is done in series.A. thatB. whereC. whichD. what7. If we _______ everything ready by now, we should be having a terrible time tomorrow.[A] hadn’t got[B] didn’t get[C] wouldn’t have got[D] wouldn’t get8. In his composition there were no other errors _______ a few misspelled words.A. besideB. exceptC. thenD. than9. In deciding _______ a course of action，the candidates tried to estimate its likely impact on the voters.[A] what to pursue [B] which to pursue [C] whether to pursue [D] if to pursue10.Since we have a focused subject, we should not talk _______.[A] at once [B] at hand [C] at intervals [D] at random11. Human beings _______a lot to the birds and beasts who eat insects.A. obligeB. oweC. thankD. gratitude12. The villages wanted very much to have a cinema_____ in this area.A. to be builtB. buildC. builtD. be build13. I wish I _______my research paper yesterday. But I was too late.[A] had finished to write [B] could have finished writing[C] could have finished to write [D] might finish writing14. No sooner _______his room when the telephone rang.[A] did he enter [B] he had entered [C] had he entered [D] he has entered15. Should she come tomorrow, I _________ take her to the museum.[A] can [B] will [C] would [D] must16. His name will be crossed out from the list _________ he makes the same mistakes again.[A] if [B] unless [C] because [D] through17. The students would not have made so much progress under less ________ conditions.[A] popular [B] welcome [C] favourable [D] prosperous18. _________ it was raining, many international tourists were having picnics in the woods.[A] In spite [B] In spite of[C] In spite of that [D] In spite of the fact that19. Lots of empty beer bottles were found under the young man's bed; he ________ heavily.[A] must have drunk [B] must drink [C] should drink [D] had to drink20. _________ home, she found that she had left the key at the office.[A] To have arrived [B] To arrive [C] While arriving [D] ArrivingThere are many words in the English language. You will never 21 the meaning of every word in English. When you read, you will often find many 22 you do not know. You will not have enough time to 23 reading and try to find every new word in a dictionary.Sometimes you can 24 a new word because you know some of the parts of the new word. For example, if a word ends 25 the letters “er”, that word 26 be the name of a 27 or a thing that does a certain action. A writer is a person who writes. 2 8 it is not 29 to know the parts of a new word to understand it, 30 it will help you many times.21. A．know B．learn C．find D．look up22. A．books B．letters C．stories D．words23. A．stop B．enjoy C．keep D．start24. A．find B．get C．study D．guess25. A．in B．off C．up D．with26. A．can B．might C．should D．must27. A．friend B．boy C．person D．girl28. A．Then B．Now C．Yet D．Sometimes29. A．helpful B．useful C．enough D．good30. A．but B. and C. so D. forPassage 1How can a single postage stamp be worth 16,800？Any mistake made in the printing of a stamp raises its value to stamp collectors. A mistake on one inexpensive postage stamp has made the stamp worth a million and a half times its original value.The mistake was made more than a hundred years ago in the British colony of Mauritius，a small island in the Indian Ocean. In 1847 an order for stamps was sent to a London printer - Mauritius was to become the fourth country in the world to issue stamps.Before the order was filled and delivered，a ball was planned at Mauritius's Government House，and stamps were needed to send out the invitations. A local printer was instructed to copy the design for the stamps. He accidentally inscribed the words 'Post Office' instead of 'Post Paid'on the several hundred stamps that he printed.Today there are only 26 of these misprinted stamps left-fourteen One-Penny Orange Reds and twelve Two-penny Blues. Because of the Two-penny Blue's rareness and age，collectors have paid as much as 16,800 for it.31．A postage stamp's value to collectors is raised if ______.[A] there are few others like it[B] there are no errors on the stamp[C] a mistake is made in the printing[D] both A and C32．Mauritius is the name of ______.[A] an island kingdom[B] a British colony[C] a province of India[D] a London printer33．The mistake on the locally printed postage stamps was in the ______.[A] spelling of postage [B] size [C] price [D] color34．Implied but not stated：______[A] All correctly printed stamps are worthless.[B] Mauritians needed the stamps to send out invitations to a ball.[C] The printer was punished for his mistake.[D] Collectors are constantly looking for stamps with mistakes.35．The best title for this passage is ______.[A] The 'Post Paid' Error[B] The Two-penny Blue[C] A London Printer's Error[D] How Mauritius Became FamousPassage 2When the weather is hot，you go to a lake or an ocean. When you are near a lake or an ocean，you feel cool. Why? The sun makes the earth hot，but it cannot make the water very hot. Although the air over the earth becomes hot，the air over the water stays cool. The hot air over the earth rises. Then the cool air over the water moves in and takes the place of the hot air. When you are near a lake or an ocean，you feel the cool air when it moves in. You feel the wind. And the wind makes you cool.Of course，scientists cannot answer all of our questions. If we ask，"Why is the ocean full of salt?"，scientists will say that the salt comes from rocks. When a rock gets very hot or very cold，it cracks. Rain falls into the cracks. The rain then carries the salt into the earth and into the rivers. The rivers carry the salt into the ocean. But then we ask，"What happens to the salt in the ocean? The ocean does not get more salty every year." Scientists are not sure about the answer to this question.We know a lot about our world. But there are still many answers that we do not have，and we are curious.36．The main idea of this passage is _____.[A] people feel cool when they are near a lake or an ocean[B] scientists can explain everything we want to know[C] scientists can explain many things but not everything[D] the salt in the ocean comes from rocks37．You feel cool when you are near a lake or an ocean because _____.[A] the water is cold[B] the earth is hot[C] the water is colder than the earth[D] cool air from the water moves towards the land38．Now scientists know _____.[A] what makes people feel cool near a lake or an ocean in summer[B] everything about the ocean[C] why the ocean does not get more and more salty[D] what happens to the salt in the ocean39．A rock cracks when _____.[A] rain falls [B] it gets very hot[C] it gets very cold [D] either B or C40．People are always curious because _____.[A] they know nothing about the world[B] they know little about the world[C] there are answers they do not have[D] either A or BPassage 3In the United States, it is not customary to telephone someone very early in the morning. If you telephone him early in the day, while he is shaving or having breakfast, the time of the call shows that the matter is very important and requires immediate attention. The same meaning is attached to telephone calls made after 11:00pm. If someone receives a call during sleeping hours, he assumes it is a matter of life or death. The time chosen for the call communicates its importance.If a late telephone call is regarded in the United States as a cause for concern, imagine the excitement and fear caused by a crowd of people arriving at the door at 2:00pm. On an island in the south Pacific, a plant manager from the United States had just such an experience. The natives of the island met one night to discuss a problem. When they arrived at a solution, they went to see the plant manager and woke him up to tell him what had been decided. Unfortunately, they did not know that it is a very serious matter to wake up Americans at such an hour. The plant manager, who did not understand the local culture, thought there was a fight and called the police. It never occurred to him (or to the natives)that parts of the day have different meanings in different cultures.41．According to the U.S. custom, what does a very early telephone call mean to an American? _____[A] Very impolite．[B] Not usual．[C] Very urgent．[D] Not necessary.42．At which of the following hours is a phone call NOT regarded as of primary importance? _____[A]11：00am．[B] 11：30pm．[C] 5：00am．[D] 12：00pm.43．Why did the natives go to the plant manager's home and wake him up?_____[A] To have a talk with him．[B] To inform him of their decision.[C] To discuss a problem with him．[D] To tell him a problem they met with.44．What was the manager's immediate reaction to the natives' arrival?_____[A] He thought the natives were mad.[B] He didn't take it seriously.[C] He called in a policeman to talk with the natives.[D] He believed there was a fight and called the police at once.45．What is most likely caused by a phone call or a visit at midnight? _____[A] Concern．[B] Fear．[C] Excitement．[D] All of the above.1. large The factory is being to make room for more machinery.2. efficient You will increase your ___ if you introduce more system into your work.3. cruel___ to children or animal is a crime in many counties.4. appear If you use this chemical to clean your shirt, the stains will___ immediately5. understand John and Mary had a ___, but they have made it up now.6. health The children looked wonderfully ___with their bright eyes and glowing cheeks.7. please The success of the experiment was a great___ and encouragement to the young scientists.8. eager She could not conceal her ___ for praise.9. construction The old professor made a number of very ___suggestions concerning soil conservation in the area.10. curious Looking up, I saw his eyes fixed on me in ___.1.战争已经威胁了这些人们几十年，他们似乎已学会接受这一现实了。

中石油18春《油矿地质学》第一二三阶段在线作业(全100分)

【石油大学】油矿地质学-第一阶段在线作业试卷总分:100 得分:100第1题,1.（2.5分）从海平面至井筒中某一测点的垂直深度A、垂直深度B、补心高度C、海拔深度D、测量深度正确答案:C第2题,2.（2.5分）宝1井的井别类型A、预探井B、开发井C、评价井D、海上开发井E、开发检查井正确答案:A第3题,3.（2.5分）钻井平台至地面的高度为A、海拔高度B、补心高度C、补心海拔D、垂直深度正确答案:B第4题,4.（2.5分）从井口沿井轨迹至井底或者某一测点的井眼实际长度A、测量深度B、垂直深度C、海拔深度D、补心高度正确答案:A第5题,5.（2.5分）港28-4井的井别类型A、开发检查井B、评价井C、开发井D、预探井E、海上开发井正确答案:C第6题,6.（2.5分）从井口到井筒中某一测点的垂直深度A、垂直深度B、测量深度C、补心高度D、海拔深度正确答案:A第7题,7.（2.5分）渤108井的井别类型A、预探井B、海上开发井C、开发井D、评价井E、开发检查井正确答案:A第8题,8.（2.5分）钻井平台至海平面的高度为A、垂直深度B、补心海拔C、海拔高度D、补心高度正确答案:B第9题,9.（2.5分）从标志层开始，从取心井段顶部依次向下将岩性与电性吻合称为A、岩心归位B、岩心位置的绘制C、井壁取心D、乱心处理正确答案:A第10题,10.（2.5分）QHD32-6-D-12井的井别类型A、开发井B、预探井C、海上开发井D、开发检查井E、评价井正确答案:C第11题,11.（2.5分）岩心分析中的相标志A、岩石颜色B、岩石类型C、颗粒结构D、沉积构造E、沉积韵律和砂体厚度正确答案:A|B|C|D|E第12题,12.（2.5分）地质录井方法包括A、岩心录井B、岩屑录井C、钻井液录井D、荧光录井正确答案:A|B|C|D第13题,13.（2.5分）钻柱测试压力恢复资料的地质应用包括A、表皮系数计算B、地层流动系数计算C、非渗透边界距离的估算D、原始地层压力推算正确答案:B|C|D第14题,14.（2.5分）原始油层压力等压图的主要用途A、预测设计井的原始油层压力B、计算油藏的平均原始油层压力C、判断水动力系统D、计算油层的弹性能量正确答案:A|B|C|D第15题,15.（2.5分）岩心编号的基本原则A、编号密度原则上储集层按20ｃｍ一个B、按其自然断块自上而下逐块编号C、编号采用带分数形式表示D、放入岩心时按照自上而下自左而右的顺序装入岩心盒正确答案:A|B|C|D第16题,16.（2.5分）取心现场观察油气水的方法A、含气实验B、含水观察C、滴水试验D、荧光试验正确答案:A|B|C|D第17题,17.（2.5分）钻柱测试（二开二关）压力卡片中的压力点A、初始静液柱压力B、初流动开始压力C、初流动结束压力D、初关井压力正确答案:A|B|C|D第18题,18.（2.5分）异常地层压力预测的方法A、地震资料预测B、钻井方法C、测井方法D、录井方法正确答案:A|B|C第19题,19.（2.5分）孔隙性储层含油岩心的含油级别A、荧光B、油迹C、油斑D、油浸E、富含油正确答案:A|B|C|D|E第20题,20.（2.5分）钻柱测试压力卡片各点压力A、初始静液柱压力B、初流动开始压力C、初流动结束压力D、初关井压力E、静液柱压力正确答案:A|B|C|D|E第21题,21.（2.5分）补心海拔为钻井平台至海平面的高度正确错误正确答案:正确第22题,22.（2.5分）港10井的井别类型为评价井错误正确答案:错误第23题,23.（2.5分）岩心收获率是实际取得的岩心长度与取心进尺的比值（百分比）正确错误正确答案:正确第24题,24.（2.5分）应用钻柱地层测试的压力资料确定的地质参数有地层流动系数、非渗透边界距离、原始地层压力等正确错误正确答案:正确第25题,25.（2.5分）表示第10次取心中共有36块岩心，此块为第4块正确错误正确答案:正确第26题,26.（2.5分）井深是井口(通常以转盘面为基准)至轨迹上某点（测点）的井眼长度正确错误正确答案:正确第27题,27.（2.5分）垂深是指井口到测点的垂直深度正确错误正确答案:正确第28题,28.（2.5分）王3-2井的井别类型为开发井正确错误正确答案:正确第29题,29.（2.5分）井斜角为井眼轴线的切线在水平面上的投影与正北方向之间的夹角正确正确答案:错误第30题,30.（2.5分）井斜方位角为井眼轴线的切线与铅垂线的夹角正确错误正确答案:错误第31题,31.（2.5分）缝洞性含油岩心的含油级别由高到低可分为富含油、油斑、油迹、荧光。

2020年春【中石油】催化原理第二阶段在线作业(标准)

【石油大学】催化原理-第二阶段在线作业试卷总分:100 得分:100第1题,1.（2.5分）共聚物中引入  官能团即可制得阳离子树脂A、-OHB、-N(CH3)2C、-SO3-D、-N(CH3)3+E、-SO4-正确答案:C第2题,2.（2.5分）分子筛的结构层次有几种A、3B、2C、4D、5E、6正确答案:C第3题,3.（ 2.5分）<imgheight="432"alt=""width="570"src="/UserFiles/Image/huangxingliang/单选题15(第二次）.JPG"/>A、.B、.C、.D、.正确答案:B第4题,4.（2.5分）哪一个不是多相催化反应步骤中的化学步骤A、反应物吸附B、反应物内扩散C、反应物脱附D、产物脱附E、产物吸附正确答案:B第5题,5.（2.5分）哪一个是化学吸附体系A、水在石墨上的吸附B、水在木材中的吸附C、水在岩石中的吸附D、水在纳米金属上的吸附E、水在纳米石墨中的吸附正确答案:D第6题,6.（2.5分）金属对下列气体分子化学吸附强度最强的是A、O2B、COC、C2H2D、H2E、N2正确答案:A第7题,7.（2.5分）半导体氧化物的最大特点是它的阳离子价态A、不可变B、可变C、结构可变D、结构不可变E、单向变化正确答案:B第8题,8.（2.5分）下面的哪种氧化物不是半导体氧化物A、ZnOB、NiOC、MgOD、MnO2E、CoO正确答案:C第9题,9.（2.5分）下面哪种物质含有固体酸中心A、MgOB、高岭土C、阴离子交换树脂D、K2CO3E、BaO正确答案:B第10题,10.（2.5分）碱土金属氧化物表面上具有种类型的碱位A、3B、1C、4D、2E、5正确答案:D第11题,11.（2.5分）对反应的影响，哪种因素不是由于固体酸催化剂产生的A、酸量B、固体表面结构C、B酸D、内扩散E、酸强度正确答案:D第12题,12.（2.5分）酸强度为 时，固体酸称为固体超酸或超强酸A、H0＞-11.9B、H0＜-11.9C、H0＜-9.0D、H0＞-9.0E、-11.9＜H0＜-9.0正确答案:B第13题,13.（2.5分）碱土金属氧化物表面上具有碱位A、具有得到电子能力的B、可提供碱性的C、可获得碱性的D、具有给予电子能力的E、可提供酸性的正确答案:B|D第14题,14.（2.5分）影响固体酸催化剂催化性能的因素有A、温度B、酸类型C、压力D、酸量E、酸强度正确答案:B|D|E第15题,15.（2.5分）离子交换树脂催化剂可用于下列哪些化学反应A、烷基化反应B、醇与烯烃的醚化反应C、烷基异构反应D、酯化反应E、醇醛缩合反应正确答案:A|B|D|E第16题,16.（2.5分）分子筛的笼形结构有A、β笼B、γ笼C、α笼D、八面沸石笼E、六方柱笼正确答案:A|B|C|D|E第17题,17.（2.5分）丝光沸石型分子筛结构中含有A、5元环B、10元环C、4元环D、8元环E、12元环正确答案:A|C|D|E第18题,18.（2.5分）分子筛催化剂有哪些择形催化类型A、反应物择形B、结构择形C、反应物择形D、中间过渡态择形E、扩散运行控制择形正确答案:A|C|D|E第19题,19.（2.5分）金属、载体间的强相互作用可导致A、氢解反应增强B、CO吸附下降C、氧化反应速率下降D、H2吸附下降正确答案:B,D第20题,20.（2.5分）哪些是BET吸附模型的条件A、单层|定位B、表面理想C、吸附质间无作用D、达到平衡E、多层|定位正确答案:A|B|D第21题,21.（2.5分）哪些是理想体系的吸附等温式A、BET吸附等温式B、Langmuir等温式C、Freundlich等温式D、Freundlich等温式正确答案:A|B第22题,22.（2.5分）金属原子产生化学吸附的必要条件是A、有未配对的d电子B、表面理想C、有未占用的d空轨道D、有未配对的s电子E、有未占用的p空轨道正确答案:A|C第23题,23.（2.5分）下面的哪种氧化物是半导体氧化物A、SiO2B、MnO2C、MgOD、ZrO2E、CoO正确答案:B,D,E第24题,24.（2.5分）洁净的固体表面上存在下面的结构A、空位B、台阶C、梯步D、平面E、拐折正确答案:A|B|C|D|E第25题,25.（2.5分）下面的晶面哪些是高Miller指数晶面A、（110）B、（796）C、（111）D、（256）E、（8|6|10）正确答案:B|D|E第26题,26.（2.5分）下面哪些化合物为Arrhenius酸碱化合物A、NaOHB、MgOC、HFD、Al2O3E、Cr2O3正确答案:A,C第27题,27.（2.5分）下面哪些化合物为Bronsted酸碱化合物A、HFB、NaOHC、NH3D、MgOE、KOH正确答案:A,C,D第28题,28.（2.5分）哪些分析手段可测定固体酸的强度A、H2吸附B、NH3脱附C、CO脱附D、红外E、吡啶程序升温脱附正确答案:A,D,E第29题,29.（2.5分）d带空穴是指金属d带未被电子充满的部分正确错误正确答案:正确第30题,30.（2.5分）金属d带空穴影响金属与反应物分子的成键强度正确错误正确答案:正确第31题,31.（2.5分）p型半导体的Fermi能级高于n型半导体的Fermi能级正确错误正确答案:错误第32题,32.（2.5分）面心立方密堆积（fcc）结构的填充分数最大正确错误正确答案:正确第33题,33.（2.5分）构型扩散是外扩散正确错误正确答案:错误第34题,34.（2.5分）化学吸附总是放热的正确错误正确答案:错误第35题,35.（2.5分）吸附等温线就是吸附等温式正确错误正确答案:错误第36题,36.（2.5分）弛豫会导致洁净固体最外表面原子排布发生改变正确错误正确答案:错误第37题,37.（2.5分）固体表面上B酸中心和L酸中心的催化作用是相同的正确错误正确答案:错误第38题,38.（2.5分）二元以上的混合氧化物中一定存在固体酸碱中心正确错误正确答案:正确第39题,39.（2.5分）固体酸催化剂表面上的酸量与催化活性之间呈顺变增加关系正确错误正确答案:错误第40题,40.（2.5分）ZSM-5分子筛结构中有5元环、10元环和12元环正确错误正确答案:错误。

福师《大学英语(2)》在线作业二答卷

C.consists of
D.consists in
答案:C
32.We didn't know his telephone number, otherwise we____________him.
A.would have telephoned
B.must have telephoned
C.Yes, help yourself
D.It doesn't matter
答案:C
20.What kind of events are you good ____?
A.at
B.to
C.in
D.after
答案:A
21.The village____________my mother grew up in is not far from the city.
A.Mary
B.Mary's
C.of Mary
D.the bike of Mary
答案:B
10.She is waiting for the doctor ____________ I know will not come.
A.whom
B.who
C.which
D.that
答案:B ห้องสมุดไป่ตู้
A.on condition that
B.in case
C.suppose that
D.for fear that
答案:A
14.—Hi, is Mary there, please? —______
A.Hold on. I'll get her.

中石油18年8月《质量健康安全环境管理体系概论》第二阶段在线作业

------------------------------------------------------------------------------------------------------------------------------ 第二阶段在线作业单选题 (共20道题)展开收起1.（2.5分）环境管理主要是针对（）而言的一种管理活动。

A、环境污染B、原生环境问题C、次生环境问题D、生态破坏正确答案：此题得分：2.5分2.（2.5分）我国环境管理的基本方针是（）。

A、预防为主B、谁污染谁治理C、强化管理D、A+B+C正确答案：此题得分：2.5分3.（2.5分）推动环境保护事业的直接动力是国家政府，而根本动力是（）。

A、社会公众B、环保部门C、决策正确答案：此题得分：2.5分4.（2.5分）环境管理的核心是对（）的管理。

A、物B、人C、技术D、资金正确答案：此题得分：2.5分5.（2.5分）在ISO14000系列标准中，（）是组织建立环境管理体系和审核认证的准则。

A、ISO14004B、ISO14001C、ISO14040正确答案：此题得分：2.5分6.（2.5分）在ISO14000中，环境方针必须包括两基本承诺，第一是对持续改进和预防污染的承诺，第二是对（）的承诺。

A、最高管理者B、满足相关方的要求C、遵守法律法规正确答案：此题得分：2.5分7.（2.5分）管理评审的主持者是（）。

A、管理者代表B、最高管理者C、内审员正确答案：此题得分：2.5分------------------------------------------------------------------------------------------------------------------------------8.（2.5分） ISO14000适用于（）。

A、只有企业B、只有企业和事业单位C、任何类型的组织正确答案：此题得分：2.5分9.（2.5分）环境管理体系运行模式与ISO9001质量保证模式相似，共同遵守“戴明管理理论”的（）模式。

北京邮电大学专升本英语2阶段作业2

一、阅读理解（共1道小题，共25.0分）1. When we can see well, we do not think about our eyes often. It is only when we can not seeperfectly that we come to see how important our eyes are.People who are nearsighted（近视）can only see things that are very close to their eyes.Many people who do a lot of close work, such as writing and reading, become nearsighted.Then they have to wear glasses in order to see distant things clearly.People who are farsighted face just the opposite problem. They can see things that are far away, but they have difficulty reading a book unless they hold it at arm's length. If they want to do much reading, they must get glasses too.Eyes are very important and they are our friends. We should protect our eyes all the time.1. We don't know that our eyes are of great importance until______.A. we think about our eyesB. we can't see clearlyC. we wear glassesD. we have to do much reading2. According to the passage, a______ is more likely to be nearsighted.A. teacherB. builderC. soldierD. gardener3. A nearsighted person usually _____.A. does not wear glassesB. wears glassesC. does not see things clearly with glassesD. sees things properly without glasses4. People who are farsighted ______.A. cannot do a lot of close work without glassesB. can only see things that are very close to their eyesC. have difficulty reading a book if they do not hold it nearD. have the same problem as the nearsighted people5. Eyes are very important to us because _____.A. we should protect them all the timeB. they are nearsightedC. we cannot see anything without themD. they are farsighted试题分值：25.0得分：[5, 5, 5, 5, 5]。

《大学英语2》2020年秋季学期在线作业(二)【中石油华东答案】

13.My house is very __________ for getting to work as it is only a few minutes from the station. fortable B.suitable C.convenient D.free
14.“Excuse me, whats the ______ of the room per day” “Fifty dollars.” A.pay B.change C.income D.charge
19.If you want his address, you will have to ______ the number in the book. A.look into B.look up C.look through D.look after
20.______ students ______ the meeting held the day before yesterday. A.The number of, attend B.A number of, attended C.The number of, attended D.A number of, attend
7.Hardly ____ to bed when he heard a knock at the door. A.had he gone B.he had gone C.did he go D.he went
8.Who is most likely to ________ the old ladys death A.benefit
B.interest C.benefit from D.profit
9.I used _______ a lot of pocket money when I was young. A.to get B.that I got C.to going D.to have got

2020年春【中石油】安全管理学第二阶段在线作业(标准)

【石油大学】安全管理学-第二阶段在线作业试卷总分:100 得分:100第1题,1.（2.5分）下面哪一种危险源属于第一类危险源?()A、有毒物质B、集聚性人群C、高速公路上浓雾茫茫正确答案:A第2题,2.（2.5分）()以上地方各级人民政府应当组织有关部门制定本行政区域内特大生产安全事故应急救援预案，建立应急救援体系。

A、乡级B、县级C、市级D、省级正确答案:B第3题,3.（2.5分）我国一般将事故应急救援体系中将事故应急预案分为——级：()A、3级B、4级C、5级D、6级正确答案:C第4题,4.（2.5分）从方法论角度，事故应急预案属于：()A、事前预防B、事中应急C、事后教训正确答案:B第5题,5.（2.5分）在生产过程、劳动过程、作业环境中存在的危害劳动者健康的因素，称为A、劳动生理危害因素B、职业性危害因素C、劳动心理危害因素D、劳动环境危害因素正确答案:B第6题,6.（2.5分）以下职业性危害因素中，高温、辐射、噪声属于____。

A、物理因素B、化学因素C、生物因素D、劳动心理因素正确答案:A第7题,7.（2.5分）下列生产过程中的危害因素，属于化学因素的是______。

A、病毒B、真菌C、工业毒物D、辐射正确答案:C第8题,8.（2.5分）由职业性危害因素所引起的疾病称为职业病，由国家主管部门公布的职业病目录所列的职业病称__职业病。

A、劳动B、环境C、重度D、法定正确答案:D第9题,9.（2.5分）目前我国工业生产中最严重的职业危害之一是＿。

A、材料B、蒸气C、气体D、尘肺正确答案:D第10题,10.（2.5分）游离二氧化硅粉尘能引起接触粉尘的职工得—一病。

A、食道癌B、皮肤肿瘤C、鼻腔癌D、矽肺正确答案:D第11题,11.（2.5分）重大事故隐患是指企业在生产经营过程中存在可能造成()人以上伤亡，或者500万元以上直接经济损失，或重大社会影响的潜在事故危害。

A、10B、6C、15D、20正确答案:A第12题,12.（2.5分）粉尘引起的职业病危害有全身中毒性、局部刺激性、变态反应性、＿、尘肺等疾病。

北京大学16秋季《大学英语1-第二组》课程作业

北京⼤学16秋季《⼤学英语1-第⼆组》课程作业⼀、交际英语(共10题，每题2分，共20分)⿎励独⽴完成作业，严惩抄袭。

1. -I'minterestedinthatchair.Howmuchdoyouwantforit?－$25.00.-_________A.Thechairisreallynice.B.That'stoomuch.C.Pleasesitdown.D.Nobodywillhaveitexceptme.2. -I'mafraidIcan'tfinishthebookwithinthisweek.-___________A.Pleasegoahead.B.That'sright.C.Notatall.D.Takeyourtime.3. -IfIwereyou,Iwouldtellherfrankly.-___________A.It'snoneofyourbusiness.B.It'smypleasure.C.Iwillthinkaboutit.D.It'sverykindofyoutotellher.4. -Howmuchisthisnecklace?-___________A.It'sverynice.B.It'sabirthdaypresentfrommyparents.C.Itcostsfiftypounds.D.It'sabargain.5. -I'dliketomakeareservationfortwodays.MynameisLiMing.-___________A.Singleroomordoubleroom?B.You'retoolatefortheroom.C.Wedon'thaveanyroom.D.Ourhotelisveryexpensive.6. -Howdoyoulikethemoviewesawyesterday?-___________A.Youarewelcome.B.Howaboutyou？C.I'veneverseenabettermoviethanit.D.Itispopularamongyoungpeople.7. -Areyoufeelingbettertoday,Mrs.Smith?-___________A.Don'tworryaboutme.B.Juststayinbedandhaveagoodrest.C.Theremustbesomethingwrong.D.Yes.ButIstillfeelalittledizzy.8. -IheardyougotafullmarkintheEnglishexam.Congratulations!-___________A.Oh,no,no.B.No,Ididn'tdoverywell.C.Thanks.D.Don'tpraiseme.9. -_____butIamafraidImustbeoffnow.-Seeyou.A.Ireallyenjoyedtalkingwithyou，B.Gladtomeetyou，C.Seeyousoon，D.Goodafternoon，10. -Ifyouneedanyhelp,don'thesitatetoaskme.-___________A.Thanks.IthinkIwill.B.Mindyou,Iwon't.C.Idon'tthinkI'llnotneedanyhelp.D.Mindyourownbusinessfirst.⼆、词汇结构(共10题，每题2分，共20分)11. There________abookandsomemagazinesonthedesk.A.isB.beC.haveD.has12. Shehad_____todo,soshewasfree.A.somethingB.anythingC.nothingD.everything13. Heisseriouslyill;thereis______hopeforhim.A.afewB.fewC.littleD.alittle14. MissWangwantedtoknow_______forthefilm.A.whywashelateB.whyishelateC.whyheislateD.whyhewaslate15. ____shesurvivedtheaccidentismiracle.A.WhatB.ThatC.AsD.Which16. Hismother_____alonesincehisfatherdied.A.livedB.livesC.haslivedD.living17. Janelikessinging.Weoftenhearher_______afterclass.A.singB.tosingC.singsD.sang18. Theman______Marywassotallthatshecouldhardlyseetheshow.A.infrontofB.inthefrontofC.atthebackofD.atthebeginningof19. Manypeoplewatchedtheboys______themountainatthattime.A.climbB.climbingC.toclimbD.climbed20. Ididn’tknowwhattodo,butthenanideasuddenly________tome.A.appearedB.happenedC.occurredD.emerged三、阅读理解(共10题，每题2分，共20分)请阅读以下⽂章，回答⽂章后的五个⼩题。

中石油华东《大学英语2》2020年秋季学期在线作业(二)答案

A: comfortable
B: suitable
C: convenient
D: free
正确答案: C
(单选题)14: ——“Excuse me, what’s the ______ of the room per day?” ——“Fifty dollars.”
A: pay
B: change
C: income
A: forbid
B: allow
C: follow
D: ask
正确答案: B
(单选题)12: I think they will go to town tomorrow, __________?
A: do I
B: don’t I
C: will they
D: won’t they
正确答案: D
(单选题)13: My house is very __________ for getting to work as it is only a few minutes from the station.
B: often
C: regularly
D: lively
正确答案: C
(单选题)5: It’s rather cold in the room. They ________ have turned off the steam a few hours ago.
A: must
B: ought to
C: could
D: Certainly not. I’m from London
正确答案: D
(单选题)7: Hardly ____ to bed when he heard a knock at the door.

中石油北京大学英语二第二阶段在线作业

第二阶段在线作业单选题 (共40道题)收起1.（分）– I failed it. --_____________.A、WhenB、How could youC、You should fail it.D、What a pity!我的答案：D此题得分：分2.（分） --I wish I had never done it. --____________A、OK.B、Don' t worry too much.C、Not at all.D、Next time.我的答案：B此题得分：分3.（分）– You know what, Linda got married yesterday! --_____ _________.A、Are you seriousB、WhenC、Where did she goD、Thank you for telling me.我的答案：A此题得分：分4.（分）– I made 500 dollars in an hour. --______________.A、OK.B、It doesn’t matter.C、Are you kiddingD、I don’t know.我的答案：C此题得分：分5.（分）– Do you agree with me -- ______________.A、No.B、I’m afraid not.C、I can’t.D、Not.我的答案：B此题得分：分6.（分）– He’s the best in the team. -- _______________.A、I agree with you.B、I don’t know.C、I’m terribly sorry.D、Nice to see you.我的答案：A此题得分：分7.（分）– I lost my purse. -- _________________.A、I’m sorry to hear that.B、WhereC、How could you lose itD、How can I help you我的答案：A此题得分：分8.（分） The sun _____in the east and ______ in the west.A、rise setB、rose setsC、risen setD、rises sets我的答案：D此题得分：分9.（分） She______ to the supermarket twice a week.A、goesB、goC、wentD、gone我的答案：A此题得分：分10.（分） As soon as you_____ at the zoo tomorrow morning give me a phone call.A、arriveB、arrivedC、are arrivingD、will arrive我的答案：A此题得分：分11.（分） I won' t go unless you_____ this afternoon.A、comeB、cameC、are comingD、will come我的答案：A此题得分：分12.（分） I will finish my homework before my sister_____back.A、comeB、comesC、will comeD、is coming我的答案：B此题得分：分13.（分） Japan_____ to the east of china.A、isB、will beC、areD、is going to be我的答案：A此题得分：分14.（分） He ran to the railway station and _____the last train.A、catchB、catchesC、caughtD、catched我的答案：C此题得分：分15.（分） I______to be a scientist when I______ a boy.A、wanted, wasB、want, amC、wanted, amD、want, was我的答案：A此题得分：分16.（分） My grandfather often______me interesting stories in m y childhood.A、tellsB、toldC、tellD、telled我的答案：B此题得分：分17.（分） The 2008 summer Olympic Games ______ in Beijing.A、were heldB、heldC、was heldD、holds我的答案：A此题得分：分18.（分） William______to bed until 12 o’clock last night.B、hadn’t goneC、wentD、has gone我的答案：A此题得分：分19.（分） What __________ him angry just nowA、makesB、makeC、madeD、making我的答案：C此题得分：分20.（分） _________ she practice her violin yesterday No, s he _________.A、Was, wasn’tB、Did, didn’tC、Was, didn’tD、Did, wasn’t我的答案：B此题得分：分21.（分） Alice ________ here next month.A、isn’t livingB、doesn’t livingC、isn’t going to living我的答案：D此题得分：分22.（分） Jim and Li Lei __________ the football match this eve ning．A、will be going to watchB、will going to watchC、are going to watchD、will go to be我的答案：C此题得分：分23.（分）—Is your father ________ —No, he ________ fishing.A、going to swim, shall goB、going to swim, will goC、will swim, is goingD、will swim, is going to我的答案：B此题得分：分24.（分） If it ______tomorrow, the sports meeting _____put off.A、rains, isB、rains, will beC、will rain, will beD、will rain, is我的答案：B此题得分：分25.（分） I______ all my work before I________.B、finishes, leavesC、will finish, will leaveD、will finish, leave我的答案：D此题得分：分26.（分）— Shall I buy a cup of coffee for you —________.A、No, you can’t.B、No, you won’t.C、No, thanks.D、No, please.我的答案：C此题得分：分27.（分）— Let’s go to play volleyball, shall we — OK. I __ _____.A、will comesB、comeC、be going to comeD、am coming我的答案：D此题得分：分28.（分） Dad ________ to us as soon as he arrives at Tibet.A、writeB、wroteC、will writeD、has written我的答案：C此题得分：分29.（分） There __________ a birthday party this evening.A、willB、shallC、will beD、shall be我的答案：C此题得分：分30.（分） ________ your sister ________ a journal from the libr aryA、Are; going to borrowB、Is; going to borrowC、Are; borrowsD、Will; going to borrows我的答案：B此题得分：分31.（分）— Will your parents go to see the Terra Cotta Warrio rs next Monday — No, ________ .A、they weren’t.B、they won’t.C、they don’t.D、they shan’t.我的答案：B此题得分：分32.（分） Prepositions（介词） ____ in the structure of English.A、take partB、take a great partC、play a large partD、play many parts我的答案：C此题得分：分33.（分） Sometimes I dream ____ running away to a desert islan d.A、toB、aboutC、ofD、with我的答案：C此题得分：分34.（分） He finally ____ in reaching the top of the mountain.A、achievedB、managedC、enabledD、succeeded我的答案：D此题得分：分35.（分） I should say that we two have nothing ____.A、with commonB、in timeC、in commonD、in need我的答案：C此题得分：分36.（分） We came finally _________ the conclusion that she has been telling lies all the time.A、ofB、intoC、toD、at我的答案：C此题得分：分37.（分） On average, a successful lawyer has to talk to severa l _______ a day.A、customersB、supportersC、guestsD、clients我的答案：D此题得分：分38.（分） A pair of spectacles ________ what I need at the mome nt.A、isB、areC、hasD、have我的答案：A此题得分：分39.（分） The young lady coming over to us _____ our English te acher; the way she walks tells us that!A、must beB、can beC、would beD、could be我的答案：A此题得分：分40.（分） As the bus came round the corner, it ran ______ a big tree by the roadside.A、intoB、onC、overD、up我的答案：A此题得分：分。

英文在线作业

中石油华东《大学英语2》2015年秋学期在线作业(三)满分答案《大学英语2》2015年秋学期在线作业（三）一,单选题1. Hardly ____ to bed when he heard a knock at the door. A. had he gone B. he had gone C. did he goD. he went ? 正确答案：A2. _____ for your laziness, you could have finished the assignment by now. A. Had it not been B. It were not C. Weren’t itD. Had not it been ? 正确答案：A3. There is no easy ______ to the problem. A. result B. question C. solution D. reason ? 正确答案：C4. We told you that he would come tonight, __________? A. didn't we B. did weC. wouldn't weD. would we ? 正确答案：A5. Working conditions in the factory are ________ few workers stay longer than three months.A. such thatB. so thatC. thatD. so 正确答案：A6. — Mum, it is nice weather. I want to skate this afternoon.—Don’t you think the ice on the lake istoo thin to __________ your weight? A. stand B. bear C. catch D. take ? 正确答案：B7. __________ from the moon, our earth, with water __________ seven percent of its surface, appears asa “blue ball”. A. Seen ... covered B. Seeing ... covering C. Seen...covering D. To see...to cover ? 正确答案：C8. I think we should let Maria go camping with her boyfriend. __________, she’s a big girl now. A. After all B. Above all C. First of all D. For all ? 正确答案：A9. They stayed up late trying to _______ out a way to solve the problem. A. give B. let C. knock D. figu re ? 正确答案：D10. The football went over the fence and we asked a boy to ______it. A. bring B. take C. fetchD. carry ? 正确答案：C11. There was a good __________ of the countryside from the front of the bus. A. sightB. viewC. sceneD. scenery ? 正确答案：B12. If you________TV every evening, of course your eyes will ache. A. sit and watchB. will sit and watchC. are to sit and watchD. sat and watched ? 正确答案：A13. They always kept on good __________ with their next-door neighbors for the children’s sake. A. friendship B. relations C. relatives D. terms ? 正确答案：D 14. The man told his girl friend he would wait for her where the three roads __________. A. link B. c onnect C. meet D. combine ? 正确答案：C15. The actor pretends to be a very brave man, but_______ he is timid and shy. A. in gen eral B. in addition C. in reality D. in short正确答案：C16. Seeing the police coming, away ____. A. the thieves ran B. had the thieves run C. r an the thieves D. did the thieves run ?正确答案：C17. What’s the language __________ in Germany? A. speaking B. spoken C. be spoken D. to spe ak ? 正确答案：B18. Mr. Lee，__________ of the __________ speech，started to read a novel. A. tired ... boring B. tiring ... bored C. tired ... bored D. tiring ... boring ? 正确答案：A19. I didn’t see the minister, ____ did I see the secretary. A. so B. nor C. neither D. none ? 正确答案：B20. ________ that we went outing. A. The weather so fine B. So fine the weather is C. S o the weather was fine D. So fine was the weather ? 正确答案：D作业1．第1题Her son promised ( ) in the bedroom until the baby stopped ( ).…to crystay …cryingstaying …to crystay …to cry答案:B您的答案：B题目分数：此题得分：2．第2题Mark often attempts to escape ( ) whenever he breaks traffic regulations. been finedhave been finedbe finedfined答案:D您的答案：D题目分数：此题得分：3．第3题As she is looking forward to ( ) from me, please remember ( ) this letter on your way to school.…postheard…posting…to posthearing…to posting答案:C您的答案：C题目分数：此题得分：4．第4题( ), the boy couldn’t enter his house.the key has lostkey was lostthe keylost the key答案:D您的答案：B题目分数：此题得分：5．第5题What’s the language ( ) in Germany?spokenspeak答案:B您的答案：B题目分数：此题得分：6．第6题They found a pile of gold at the entrance. There was ( ) more inside the cave.of答案:B您的答案：C题目分数：此题得分：7．第7题There was a good ( ) of the countryside from the front of the bus.答案:B您的答案：B题目分数：此题得分：8．第8题I think we should let Maria go camping with her boyfriend. ( ), she’sa big girl now.allallof allall答案:A您的答案：B题目分数：此题得分：9．第9题The sun is ( ), far away from the earth.答案:C您的答案：C题目分数：此题得分：10．第10题The complicated problem can be solved by the computer within ( ) a few seconds.答案:B您的答案：B题目分数：此题得分：11．第11题( ) from the moon, our earth, with water ( ) seventy percent of its surface, appears as a “blue ball”.…covered…covering…coveringsee…to cover答案:C您的答案：C题目分数：此题得分：12．第12题My house is very ( ) for getting to work as it is only a few minutes from the station.答案:C您的答案：C题目分数：此题得分：13．第13题I finally got the job I dreamed about. Never in my life ( ) so excited.I feelfelthad feltI felt答案:C您的答案：D题目分数：此题得分：14．第14题If you ever have the ( ) to go abroad to work, you should take it.答案:D您的答案：D题目分数：此题得分：15．第15题I think they will go to town tomorrow, ( )?I’t Ithey’t they答案:D您的答案：D题目分数：此题得分：16．第16题I didn’t see the minister, ( ) did I see the secretary.答案:B您的答案：B题目分数：此题得分：17．第17题Mrs. Smith warned her daughter ( ) after drinking.to drivenever drivedrivingdrive答案:A您的答案：D题目分数：此题得分：18．第18题A party is the ( ) activity I want to take part in.答案:D您的答案：D题目分数：此题得分：19．第19题“How do you do?” “”do you do?you..D. How are you.答案:A您的答案：A题目分数：此题得分：20．第20题I don’t doubt ( ) the stock market will recover from t he economic crisis.答案:C您的答案：C题目分数：此题得分：21．第21题The first textbook ( ) for teaching English as a foreignlanguage came out in the 16th century.C. to writeD. to be written答案:B您的答案：B题目分数：此题得分：22．第22题There ( ) more than 300,000 kinds of plants on the earth.existing答案:A您的答案：D题目分数：此题得分：23．第23题Our English teacher ( ) our buying a good English-Chinese dictionary.答案:C您的答案：C题目分数：此题得分：24．第24题–Do you think living in the countryside has more advantages? --( ). , perfectly., it depends, it is.at all.答案:B您的答案：B题目分数：此题得分：25．第25题( ) with the developed countries, some African countri es are left far behind in terms of people’s living standard.A. Comparecompared答案:C您的答案：C题目分数：此题得分：26．第26题The Great Wall more than 2000 years old.D. was答案:A您的答案：A题目分数：此题得分：27．第27题So ( ) after she learned the good news that she could hardly fall asleep that night.the mother wasthe mother excitedmother was excitedwas the mother答案:D您的答案：A题目分数：此题得分：28．第28题Millions of pounds’ worth of damage ( ) by a storm which swept across the north of England last night.been causedbeen causedbe causedhave been caused答案:A您的答案：A题目分数：此题得分：29．第29题–You’ve won the b asketball game. Congratulations! --( )., not really.one else could do it.you. We’re really lucky.’s good of you to say so.答案:C您的答案：C题目分数：此题得分：30．第30题No sooner ( ) to bed than he heard a knock at the door.he gonehad gonehe gowent答案:A您的答案：A题目分数：此题得分：31．第31题The President ( ) went to see the flood-stricken areas.said答案:A您的答案：A题目分数：此题得分：32．第32题The man told his girlfriend he would wait for her where the three roads ( ).答案:C您的答案：C题目分数：此题得分：33．第33题Mr. Lee, ( ) of the ( ) speech, started to read a novel.…boring…bored…bored…boring答案:A您的答案：A题目分数：此题得分：34．第34题If you are worried ( ) the problem, you should do something about it.C. on答案:D您的答案：D此题得分：35．第35题Look, a group of are playing football.答案:B您的答案：B题目分数：此题得分：36．第36题if you knock into someone ｏr get in his way, you should say, “（）”.me, I beg your pardon, I’m sorryme, I’m sorryme, I beg your Pardon答案:C您的答案：C题目分数：此题得分：37．第37题Li Lei didn’t meet the famous American professor ( ) he was on holiday in America last year.A. unless答案:B您的答案：B题目分数：38．第38题The problem of housing ( ) leads to the problem of social instability.答案:A您的答案：C题目分数：此题得分：39．第39题( ) up at the clock on the wall, the secretary foundit was already midnight.A. Lookinglook答案:A您的答案：A题目分数：此题得分：40．第40题It was the officer ( ) informed the village of the danger.答案:B您的答案：B题目分数：此题得分：41．第41题it’s a fine day. Let’s go fishing, ( )?’t wewe’t wewe答案:D您的答案：D题目分数：此题得分：42．第42题They always kept on good ( ) with their next-door neighbors for the children’s sake.答案:D您的答案：B题目分数：此题得分：43．第43题–Mum, it is nice weather. I want to skate this afternoon. --Don’t you think the ice on the lake is too thin to ( ) your weight?答案:B您的答案：B题目分数：此题得分：44．第44题“() there any bread on the plate?” “Sorr y, I don’t know.”答案:A题目分数：此题得分：45．第45题There are about（）workers in our factory.hundredhundred ofhundredsof答案:A您的答案：A题目分数：此题得分：46．第46题By the end of this year Mr. Smith ( ) in our company for e xactly three years.A. is workingworkedworkhave worked答案:D您的答案：D题目分数：此题得分：47．第47题–We mustn’t lose heart, must we? All the teachers are encouraging us. --, we must., we mustn’t, we must., we mustn’t.答案:D您的答案：D题目分数：48．第48题We told you that he would come tonight, ( )?’t wewehe’t he答案:A您的答案：A题目分数：此题得分：49．第49题The current political ( ) of our country is favorable for foreign investments.答案:A您的答案：A题目分数：此题得分：50．第50题We must hurry up（）we can’t c atch the early bus.A.ａndB.ｏr答案:B您的答案：B题目分数：此题得分：作业总得分：作业总批注：。

2021年中石油安全文化第二阶段在线作业

中石油安全文化第二阶段在线作业单选题 (共15道题)1.（2.5分）在安全生产中起决定性作用是（）。

•A、物原因•B、人原因•C、规则原因•D、法律原因•E、天气原因我答案: B此题得分: 2.5分2.（2.5分）（）既包含物原因, 也包含人原因, 所以它是联结人与物链条•A、安全规则•B、法律•C、生产环境•D、安全管理制度•E、生产习惯我答案: D此题得分: 2.5分3.（2.5分）从安全原理角度看, 生产事故和生产中一切有害原因都存在（）问题。

•A、天气原因•B、人因•C、制度•D、偶然原因•E、地理环境我答案: B此题得分: 2.5分4.（2.5分）一枚安全徽章, 属于（）文化层。

•A、物质•B、行为•C、制度•D、精神•E、抽象我答案: A此题得分: 2.5分5.（2.5分）事故调查处理过程属于（）文化层。

•A、物质•B、行为•C、制度•D、精神•E、抽象我答案: B此题得分: 2.5分6.（2.5分）安全精神文化层面安全卫生环境保护行为规范, 这属于（）范围。

•A、物质•B、行为•C、制度•D、精神•E、道德我答案: E此题得分: 2.5分7.（2.5分）设计理念是安全生产中（）。

•A、物原因•B、人原因•C、规则原因•D、法律原因•E、天气原因我答案: A此题得分: 2.5分8.（2.5分）分析安全事故要着重从（）上找原因。

•A、物原因•B、人原因•C、规则原因•D、法律原因•E、天气原因我答案: B此题得分: 2.5分9.（2.5分）违章违纪是属于（）。

•A、物原因•B、人原因•C、规则原因•D、法律原因•E、天气原因我答案: B此题得分: 2.5分10.（2.5分）职员责任心起源于两个基础事实: 一是利益, 二是（）•A、规则•B、法律•C、情感•D、道德约束•E、生产环境我答案: C此题得分: 2.5分11.（2.5分）从利益方面看, 一般工人各方面利益得不到保障, 尤其是基础（）利益得不到保障。

19秋中石油北京校区机械基础设计与制造第二阶段在线作业

19秋中石油北京校区机械基础设计与制造第二阶段在线作业A、增大小带轮直径B、减小小带轮直径C、增带轮直径D、减小中心距正确答案：A2.（2.5分）在一般机械传动中，若需要选用带传动，应优先选用( )A、圆型带B、同步齿形带C、V带D、平型带正确答案：C3.（2.5分）带传动中，小带轮速度为V1，大带轮速度为V2，带速为V，则三者的关系为()A、V1.V。

V2B、V1=V=V2C、V2.V。

V1D、V1.V2.V正确答案：A4.（2.5分）转轴弯曲应力的应力循环特性为( )A、r=-1B、r=0C、r=1D、-1< r< 1精确谜底：A5.（2.5分）按弯扭合成计较轴的强度时，当量弯矩计较式中α是为了考虑扭矩T与弯矩M产生的应力( )A、方向不同B、循环特征不同C、类型不同D、位置不同精确谜底：B6.（2.5分）固定心轴弯曲应力的特征是( )A、脉动循环应力B、对称循环应力C、静应力D、非对称循环应力正确答案：A7.（2.5分）为了减小轴的应力集中，进步轴的委靡强度，应使轴的( )A、阶梯处过渡圆角尽量小B、阶梯尽量多C、阶梯处过渡圆角尽量大D、相邻阶梯的直径差尽量大正确答案：C8.（2.5分）火车车辆的轴是( )A、传动轴B、转轴C、固定心轴D、转动心轴精确谜底：D9.（2.5分）修正系数取α=1的轴，其承受的转矩性质是( )A、平稳转矩B、脉动循环转矩C、对称循环转矩D、非对称循环转矩精确谜底：C10.（2.5分）转轴是( )A、只受弯矩不受扭矩的轴B、只受扭矩不受弯矩的轴C、既受弯矩又受扭矩的轴D、只受轴向载荷的轴正确答案：C11.（2.5分）带传动中，弹性滑动( )A、在XXX足够时可以避免B、在通报功率较小时可以避免C、在小带轮包角足够大时可以避免D、是不可避免的正确答案：D12.（2.5分）在轴的结构中，与轴承配合的部分称为( )A、轴肩B、轴头C、轴颈D、轴身正确答案：C13.（2.5分）转轴的强度计较办法是( )A、按扭转强度计算B、按弯扭合成强度计较C、按弯曲强度计算D、按静强度计算正确答案：B14.（2.5分）转轴在弯曲变应力作用下会产生( )A、疲劳弯断或过量的扭转变形B、委靡弯断或过量的曲折变形C、疲劳扭断或过量的弯曲变形D、委靡扭断或过量的扭转变形正确答案：B15.（2.5分）用于齿轮箱中的轴是( )A、固定心轴B、传动轴C、转动心轴D、转轴精确谜底：D16.（2.5分）轴端零件的轴向固定可用( )A、轴肩B、轴环C、套筒D、圆螺母精确谜底：D17.（2.5分）下列四种型号的滚动轴承中，主要承受径向载荷的是( )A、B、C、D、正确答案：B18.（2.5分）在基本额定动载荷作用下，滚动轴承的基本额定寿命为106转时，其可靠度为( )A、0.1B、0.8C、0.9D、0.99正确答案：C19.（2.5分）对于主要承受径向载荷、支点跨距大和弯曲刚度小的轴，其支承轴承应选用的滚动轴承型号为( ) A、B、C、D、正确答案：B20.（2.5分）代号为318的滚动轴承，内径尺寸为( )A、90 mmB、40mmC、18mmD、8mm正确答案：A21.（2.5分）既能承受径向力又能承受较大轴向力的滚动轴承是( )A、推力球轴承B、圆柱滚子轴承C、圆锥滚子轴承D、滚针轴承精确谜底：C22.（2.5分）带传动作减速传动时，带的最大应力σmax 即是( )A、σ1+σb1+σcB、σ1+σb2+σcC、σ2+σb1+σcD、σ2+σb2+σc精确谜底：A23.（2.5分）滚动轴承寿命计算式Lh，Lh的单位是( )A、106转B、106小时C、小时D、转正确答案：C24.（2.5分）角打仗球轴承首要承受( )A、较大的纯径向力B、较大的径向力和单向轴向力C、较大的纯轴向力D、较大的轴向力和较小的径向力精确谜底：B25.（2.5分）轴承的寿命指数ε是( )A、3正确答案：C26.（2.5分）在优秀的密封和光滑条件下，滚动轴承的首要失效形式是( )A、塑性变形B、胶合C、磨损D、委靡点蚀正确答案：D27.（2.5分）对于载荷不大、多支点的支承，宜选用( )A、深沟球轴承B、角打仗球轴承C、调心球轴承D、圆锥滚子轴承正确答案：C28.（2.5分）不经常转动或转速极低的滚动轴承，其主要失效形式是( )A、疲劳点蚀B、磨损C、胶合D、塑性变形正确答案：D29.（2.5分）下列滚动轴承中，极限转速最高的轴承是( )A、推力球轴承B、深沟球轴承C、调心滚子轴承D、圆锥滚于轴承正确答案：B30.（2.5分）角打仗球轴承7210B的打仗角α为( )A、10°B、15°C、25°D、40°正确答案：D31.（2.5分）一般转速滚动轴承的主要失效形式是( )A、过量的塑性变形B、过度磨损C、委靡点蚀D、胶合精确谜底：C32.（2.5分）角接触球轴承承受的载荷增大一倍时，轴承的寿命是原来的( )A、2倍C、8倍精确谜底：D33.（2.5分）带传动作减速传动时，带的最大应力发生在( )A、带离开大带轮处B、带绕上大带轮处C、带离开小带轮处D、带绕上小带轮处正确答案：D34.（2.5分）A、B、C、D、正确答案：D35.（2.5分）设计V带传动时，选择小带轮基准直径d1≥dmin，主要目的是( )A、使传动的包角不致过小B、使带的弯曲应力不致过大C、增大带与带轮间的摩擦力D、便于带轮的制造正确答案：B36.（2.5分）带传动的设想准则是保证带在要求的工作限期内( )A、不发生过度磨损B、不发生打滑和疲劳破坏C、不发生弹性滑动D、不发生磨损又不发生打滑精确谜底：B37.（2.5分）带传动中，初拉力为F0，紧边拉力为F1，松边拉力为F2，则圆周力F即是()A、F0-F2B、F1-F0C、F1+F2D、F1-F2正确答案：D38.（2.5分）带传动产生打滑的原因是( )A、紧边拉力F1大于摩擦力极限值B、紧边拉力F2大于摩擦力极限值C、圆周力F大于摩擦力极限值D、0.5(F1+F2)大于摩擦力极限值正确答案：C39.（2.5分）普通V带传动，小带轮包角α应不小于120°，主要是为了( )A、减小弹性滑动B、减小离心拉应力C、减小弯曲应力D、增大摩擦力精确谜底：D40.（2.5分）传递相同功率，与平带传动相比，V带的主要优点是( )A、传动装置结构简单B、价格便宜C、传动装置结构紧凑D、传动比准确正确答案：C1.（2.5分）带传动中，为了增大小带轮包角α，可以( )A、增大小带轮直径B、减小小带轮直径C、增带轮直径D、减小中心距正确答案：A2.（2.5分）在一般机械传动中，若需要选用带传动，应优先选用( )A、圆型带B、同步齿形带C、V带D、平型带正确答案：C3.（2.5分）带传动中，小带轮速度为V1，大带轮速度为V2，带速为V，则三者的关系为()A、V1.V。

中石油大学22春季《电子商务网站系统分析与设计》第二阶段在线作业

第二阶段在线作业
单选题(共20道题)
收起
1.（
2.5分）一般而言，以（）为手段的商务活动都可以算是电子商务，但是从其内容和形式上可以将其分成广义电子商务和狭义电子商务两类。

A、电子科技
B、电子技术
C、数字技术
D、网络技术
【正确答案】：B
2.（2.5分）狭义电子商务指通过Internet（包括企业内部网Intranet）或（）进行的交易活动。

A、电子数据交换
B、电子信息交换
C、电子信息
D、数据交换
【正确答案】：A
3.（2.5分）电子商务系统的（）建造方式，是指电子商务系统的建造完全交给专业化的技术企业，由专业化的公司根据企业的需求，完成电子商务系统的建造的整个过程。

A、包租式
B、自主开发
C、内包式
D、外包方式
【正确答案】：D
4.（2.5分）结构化分析方法采用（）作为刻画数据流及其处理转换的工具。

A、数据流图
B、数据字典
C、过程图
D、决策树
【正确答案】：B
5.（2.5分）事务的特性有原子性、一致性、独立性和（）。

A、永久性
B、单一性
C、不可逆性
D、临时性
【正确答案】：B
6.（2.5分）（）的电子零售系统实际上就是Internet 上的虚拟中介（批发商、零售商）。

A、B2C
B、C2C
C、B2B
D、C2B
【正确答案】：A
7.（2.5分）SSL 握手协议包含两个阶段，第一个阶段用于建立私密性通信信道，第二个阶段用于（）。