试题与答案

在射线探伤中,影响缺陷检测的因素很多,除了X射线胶片和增感屏的特性、散射线对射线照相

题型:填空题

题目:

在射线探伤中,影响缺陷检测的因素很多,除了X射线胶片和增感屏的特性、散射线对射线照相的影响外还有几何不清晰度、固有不清晰度、()、射线的入射方向及透照厚度差等。

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B

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根据下面的英文提示所提供的情景,请你帮助李明出主意,写出你解决问题的想法。词数不少于50。

On the morning of June 7, Li Ming is taking a bus on his way to take the entrance examination. Unfortunately, he is caught in a traffic jam because of an accident. How can he manage to get there in time? Please think out two or three different ways for him.

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