题目内容
在某温度下，反应1/2N2(g) + 3/2H2(g)→NH3(g)的平衡常数K=a。上述反应如果改写为2NH3(g) →N2(g) + 3H2(g)，则在相同温度下反应的平衡常数为
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There are ten sentences in this section. Beneath each sentence there are four words or phrases marked A, B, C and D. Choose one word or phrase that best completes the sentences.1. I have found that the community has _____ great changes since I was here last.A. submitted B. undergone C. sustained D. experimented2. In running this business, I need to ______ ask myself whether what I’m doing is aligned with my goals.A. invariably B. usually C. endlessly D. constantly3. He was the sort of good listener who seemed to find everybody else more interesting and______than himself.A. impossible B. impressive C. unlikely D. unimaginable4. It is much better to concentrate on a few subjects which interest you than try to _____ your mind with knowledge.A. fill B. full C. meet D. fulfill5. Rather than being hoodwinked, I would ______ anything.A. indulge B. diverge C. endure D. instruct6. A fortunate encounter brought the two friends together after a long _______.A. distinction B. difference C. separation D. discrimination7. Most of us thought that you ______ to those questions in an interesting and unusual way.A. reacted B. impacted C. worked D. acted8. I have often seen him ______ upon the moon and stars for hours. Why do you think he is doing that?A. look B. glance C. stare D. gaze9. We ________ a parent to care for us, to forgive us our errors, and to save us from our childish mistakes.A. search for B. long for C. for long D. look after10. His occasional courtesies did not _______ his general rudeness.A. compensate for B. pay back C. keep up D. change into
( )单元组成部分包括:旋转工作台模块、钻孔模块、钻孔检测模块、电气控制板、操作面板、I/O转接端口模块、CP阀岛、过滤减压阀等。
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S7-200系列PLC的Q0.0或Q0.1输出端产生高速脉冲。
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