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【判断题】
细长压杆失效的原因是失稳A.
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【简答题】（14分）研究NO 2 、SO 2 、CO等大气污染气体的测量及处理具有重要意义。 （1）I 2 O 5 可使H 2 S、CO、HC1等氧化，常用于定量测定CO的含量。已知： 2I 2 (s) + 5O 2 (g)= 2I 2 O 5 (s) △ H =－75.56 kJ·mol － 1 2CO(g) + O 2 (g)= 2CO 2 (g) △ H =－566.0 kJ·mol － 1...
【单选题】Science and Technology There is a difference between science and technology._____（46） Science has to do with discovering the facts and relationships between observable phenomena in nature and with est...
A.
Another distinction between science and technology has to do with the progress in each.
B.
Unlike science, progress in technology must be measured in terms of the human factor.
C.
What scientists discover may shock or anger people－as did Darwin's theory of evolution.
D.
Science and technology are different.
E.
We are all familiar with the improper use of technology.
F.
Science is a method of answering theoretical questions; technology is a method of solving practical problems. 第 46 题 请选择（46）处的最佳答案．
【简答题】阅读理解。 Have you ever spoken or acted before the public? Have you got stage fright c怯场)? Many people have such an experience but they feel differently about it. Some are just a little nervous, others ...
【简答题】What significance do you think this stage have?
【单选题】词义替换。 —What do you often do in your spare time ? —Play basketball.
A.
have nothing to do
B.
in your free time
C.
in your own time
D.
have no time
【简答题】根据国家环保总局的统一规定，目前进行常规大气监测的主要指标有二氧化硫、氮的氧化物、可吸入固体颗粒等三项。以下是国家关于空气的污染指数与质量级别、质量状况的对应关系表： (1)大理市2008年10月25日公布的空气污染指数为76~81，根据以上信息判断大理市当天的空气质量级别和空气质量状况分别是____和______。 (2)产生二氧化硫的污染源是____。 (3)减少空气中可吸入颗粒物的措施___...
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