回溯推理的前提条件是什么？_爱下问搜题

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问题问答题论述题

回溯推理的前提条件是什么？

答案

参考答案：

提出的假说能解释观察到的事实。前提条件：尝试性假说为前提条件，即是，研究的节约规定我们应当我们研究的某个阶段尝试一种特定的假说，只要事实允许我们就可以暂时认可它，没有关于它的概率，它仅仅是我们尝试性接受的一个建议。

判断题

钢板探伤时，通常只根据缺陷波的情况来判定缺陷。（）

完形填空

I lay there buried alive under our house when the bomb hit our city. The great 21 started by the bomb came nearer and nearer to us as workers tried to 22 us. “Hurry!” they cried to one another as the flames (火焰) came nearer. At last they reached us and 23 me and my mother out from under everything 24 the flames reached us.
Later, as I thought of the pilot of the plane that 25 the bomb on our city, I cried, “I hate him. I hate him.” The people with marked faces from the 26 of the bomb made me cry, “I hate him.” I saw people suffering (遭受) a terrible, 27 death. Again and again I cried as I saw these people, “I hate him!”
Some time later, that man appeared in a meeting I 28 .As I looked at him, I 29 him very much. Then I listened to what he told us of his 30 the day when he dropped the bomb on our city. I heard him say, “When I flew over the city 31 we dropped the bomb, I cried, ‘Oh, God, what have I 32 ’.” I could see that he found it 33 to speak of that day.
As this happened I suddenly 34 my hatred (仇恨) of him was 35 . It only made me unhappy also. As I did this, it was as if a heavy load (负担) 36 my shoulders. Then I decided to 37 him. I did so and my life was 38 .
I now help those who suffer from 39 other people. I try to help them to 40 everyone, as I am now able to do.

A．forgive(原谅)