转化器温度过高的主要原因（）-我要搜题网

[不定项选择题]共用题干 Batteries Built by Viruses
What do chicken pox,the common cold,the flu,and AIDS have in common?They're all diseases caused by viruses,tiny microorganisms that can pass from person to person. It's no wonder that when most people think about viruses,finding ways to steer clear of viruses is what's on people's minds.
Not everyone runs from the tiny disease carriers,though. In Cambridge,Massachu- setts,scientists have discovered that some viruses can be helpful in an unusual way. They are putting viruses to work,teaching them to build some of the world's smallest rechargeable batteries.
Viruses and batteries may seem like an unusual pair,but they're not so strange for engi-neer Angela Beicher,who first came up with the idea. At the Massachusetts Institute of
Technology(MIT)in Cambridge,she and her collaborators bring together different areas of science in new ways.In the case of the virus-built batteries,the scientists combine what they know about biology,technology and production techniques.
Beicher's team includes Paula Hammond,who helps put together the tiny batteries,and
Yet-Ming Chiang,an expert on how to store energy in the form of a battery.“We're working on things we traditionally don't associate with nature，”says Hammond.
Many batteries are already pretty small. You can hold A,C and D batteries in your hand. The coin-like batteries that power watches are often smaller than a penny. However, every year,new electronic devices like personal music players or cell phones get smaller than the year before. As these devices shrink,ordinary batteries won't be small enough to fit in-side.
The ideal battery will store a lot of energy in a small package. Right now,Belcher's model battery,a metallic disk completely built by viruses,looks like a regular watch battery. But inside,its components are very small一so tiny you can only see them with a powerful microscope.
How small are these battery parts?To get some idea of the size,pluck one hair from your head. Place your hair on a piece of white paper and try to see how wide your hair is一 pretty thin,right?Although the width of each person's hair is a bit different,you could probably fit about 10 of these virus-built battery parts,side to side,across one hair. These micro-batteries may change the way we look at viruses. What is Belcher's team doing at present?
A.It is finding ways to get rid of viruses.
B.It is mass-producing micro-batteries.
C.It is making batteries with viruses.
D.It is analyzing virus genes.

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[单选题]公式T2=T4+(T5-T4)xQ1+Q2是变泵时间晚于钻达时间、早于岩屑录取时间的岩屑录取时间计算公式,式中(T5―T4)的单位为( )。SY/T5788.3-2014)[1分]
A.min
B.h:min
C.L/min
D.min/L

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[判断题]一组视图没有标注尺寸也可以确定该物体的形状大小。
A.正确
B.错误

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[单项选择]按照合理的步骤进行风险利用操作，首先应进行的步骤是( )。
A. 制定对策和具体实施方案
B. 客观评估自身的风险承受能力
C. 分析风险利用的可能性及其价值
D. 计算风险利用的费用

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[判断题]法定检疫物，除活动物在口岸检疫外，原则上坚持产地检验。

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[单选题]( )是指与轻型发电机组装为一体，可由人力移动的消防泵。
A.水环泵
B.刮片泵
C.喷射泵
D.手抬泵

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[填空题]Questions 6-11
Reading Passage 1 has seven paragraphs, A-G.
Which paragraph contains the following information
Write the correct letter, A-G in boxes 6-11 on your answer sheet.
What the fast food industry should do to make up the negative influence.

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[判断题]各单位应积极配合FOD管理办公室，及时准确上报捡拾的FOD相关信息和实物。
A.正确
B.错误

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[单选题]单选题钢中加入Mn元素主要为提高钢的( )。
A.强度
B.塑性
C.抗氧化性

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[单项选择]辩证的否定是指（）。
A. 外力否定
B. 自我否定
C. 任意否定
D. 甲变乙，乙变甲

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[单选题]CRH5型动车组牵引变压器绕组将一次绕组电压降压输送至牵引变流器。
A.五次
B.二次
C.三次
D.四次

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[判断题]（）TEDS磁钢表面有划痕后，为了不影响接车，最好将其更换，并下调高度。
A.正确
B.错误

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[填空题]黑箱测试不考虑程序内部细节、结构和实现方式，只是根据程序（）说明来设计测试用例。

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[判断题](45141)(　　)施工地段放行列车限速vmax≤45km/h时，每个接头螺栓至少拧紧4个(每端2个)。( )
(1.0分)
A.正确
B.错误

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[单选题]炖菜的加热时间一般在()范围。
A. 1-3小时
B. 2-4小时
C. 1-5小时
D. 3-5小时

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[单选题]Passage 2 That experiences influence subsequent behavior is evidence of an obvious but nevertheless remarkable activity called remembering. Learning could not occur without the function popularly named memory. Constant practice has such an effect on memory as to lead to skillful performance on the piano, to recitation of a poem, and even to reading and understanding these words. So-called intelligent behavior demands memory, remembering being a primary requirement for reasoning. The ability to solve any problem or even to recognize that a problem exists depends on memory. Typically, the decision to cross a street is based on remembering many earlier experiences. Practice (or review) tends to build and maintain memory for a task or for any learned material. Over a period of no practice what has been learned tends to be forgotten; and the adaptive consequences may not seem obvious. Yet, dramatic instances of sudden forgetting can be seen to be adaptive. In this sense, the ability to forget can be interpreted to have survived through a process of natural selection in animals. Indeed, when one's memory of an emotionally painful experience leads to serious anxiety, forgetting may produce relief. Nevertheless, an evolutionary interpretation might make it difficult to understand how the commonly gradual process of forgetting survived natural selection. In thinking about the evolution of memory together with all its possible aspects, it is helpful to consider what would happen if memories failed to fade. Forgetting clearly aids orientation in time,since old memories weaken and the new tend to stand out, providing clues for inferring duration. Without forgetting, adaptive ability would suffer, for example, learned behavior that might have been correct a decade ago may no longer be. Cases are recorded of people who(by ordinary standards) forgot so little that their everyday activities were full of confusion. This forgetting seems to serve the survival of the individual and the species. Another line of thought assumes a memory storage system of limited capacity that provides adaptive flexibility specifically through forgetting. In this view, continual adjustments are made between learning or memory storage (input) and forgetting (output). Indeed, there is evidence that the rate at which individuals forget is directly related to how much they have learned. Such data offers gross support of contemporary models of memory that assume an input-output balance. From the evolutionary point of view, __________.
A.sudden forgetting may bring about adaptive consequences
B.forgetting for lack of practice tends to be obviously inadaptive
C.if a person gets very forgetful all of a sudden, he must be very adaptive
D.forgetting is an indication of an individual's adaptability

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[单项选择]1995年3月生效《中华人民共和国中国人民银行法》将我国货币政策的最终目标确定为（）。
A. 稳定币值和经济增长
B. 稳定币值和充分就业
C. 稳定币值和国际收支平衡
D. 稳定币值并以此促进经济增长

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[单选题]刘某没有代理权，冒充王某的代理人，在票据上以代理人名义签章，该票据责任的承担者是( )。
A.王某
B.刘某
C.刘某和王某
D.票据相对人

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[多选题]安全生产方针是( )。
A.安全第一
B.预防为主
C.防治结合
D.综合治理

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[判断题]开门器用于开启金属、非金属门窗等结构,从而解救被困于危险环境中的受害者。（）
A.正确
B.错误

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[多项选择]以鲁迅为领路人的乡土文学作家群，主要有王鲁彦、许钦文（）等。
A. 彭家煌
B. 许杰
C. 蹇先艾
D. 茅盾

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[单项选择]The attitude of the narrator towards this message is ______.
A. neutral
B. bitter
C. excited
D. expectant