题目内容

由入射X射线所激发出来的特征X射线称为。

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光电效应所造成的消耗即为真吸收。

X射线的波长在约范围内，用于衍射分析的X射线波长范围为。

X射线的产生条件：①。②。③。

Part II··Structure ··（10 minutes)Directions: This part is to test your ability to construct grammatically correct sentences. It consists of2 sections.Section A21. While______________ a survey on smartphone use,the marketing manager found that most people she talkedto had a Huawei.

A)conduct
B) conducted
C)conducting
D) to conduct