冻后聚墒和夜潮作用的机理是什么？
题型：问答题 简答题
问题：
冻后聚墒和夜潮作用的机理是什么？
题型：问答题 简答题
第二节 完型填空（共10小题；每小题1分，满分10分）
阅读下面短文，掌握其大意，然后从第31至第40小题所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。
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I have had thousands of classes since I started school nine years ago. But only one 31 was the most important.
It happened last term just after I had got a bad result in an exam. I was sad and had lost my confidence .I decided to go to a class which can tell me how to be 32
The speaker walked into the room But he didn’t start talking like a teacher. Instead, he held up a twenty yuan note!
“Who wants this?” he asked. Unsurprisingly, 33 of us in the class held up our hands. The speaker smiled. Then he put up the note on the blackboard and asked the same question. Again, we all put up our hands. The speaker smiled again, but 34 nothing. Suddenly, he threw the note onto the floor! Then he asked the same question a third time. I didn’t 35 what the speaker was doing. Why was he asking the same question again and again? I didn’t know what to do. I wanted the note, 36 I put my hand up again. After a while, he 37 the note and started to laugh. ’You have all just told me how to become successful,” he said to us with the note in his hand.
“The note is worth twenty yuan. It is 38 worth twenty yuan, even though I throw it on the floor. You are like the note. No matter what happens to you, you still have your teeth.’ When I heard those words, I 39 I was worth a lot. I may have done in an exam, but it doesn’t 40. I can’t do well in the future. If I believe in myself, I will be successful!
31．A．classroom B．subject C．class D．school
32．A．comfortable B．successful C．famous D．rich
33．A．both B．neither C．all D．none
34．A．said B．bought C．saw D．wanted
35．A．remember B．understand C．notice D．find
36．A．so B．though C．if D．or
37．A took out B．threw away C．picked up D．put down
38．A．never B．sometimes C．hardly D．always
39．A．realized B．forgot C．dreamed D．decided
40．A．know B．mean C．think D．complain