题目

有一化学平衡mA(g)＋nB(g) pC(g)＋qD(g)，如图表示的是A的转化率与压强、温度的关系。下列叙述正确的是  A．正反应是放热反应；m＋n>p＋q         B．正反应是吸热反应；m＋n<p＋q C．正反应是放热反应；m＋n<p＋q        D．正反应是吸热反应；m＋n>p＋q 答案：D 完形填空。      Some one says," time is money." But I think time is   1   important than money. Why? Because when money is spent, we can get it back. however, when time is   2  , It'll never return. That is   3   we must't waste time. It goes without saying that time is usually limited. Even a second is very important. we should make full use of our time to do   4   useful.      But it is a pity that there are a lot of people who don't know the important of time. They   5   their limited time smoking, drinking and playing cards. They don't know that wasting time means wasting part of their own   6  .     In a word, we should save time. we shouldn't leave today's work for tomorrow, Remember: we have no time to lose. (     )1.  A. less   (     )2.  A. lost   (     )3.  A. what   (     )4.  A. nothing(     )5.  A. spend  (     )6.  A. work   B. much less    B. finished   B. because       B. something   B. take        B. money       C. even more     C. bought     C. why           C. anything                       C. pay        C. lives