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问题 单项选择题

我国标准规定加速器X射野（方野）的均整度的检定周期（）

A.每日

B.每周

C.每月

D.每半年

E.每年

答案

参考答案：D

解析：我国标准规定加速器X射野（方野）的均整度的检定周期为每半年。

问答题

(A) Malcolm sits by the window.(B) Malcolm lives in New York (C) Elsa lives in Florida.(D) Elsa changed her seat because a man next to her was smoking.(E) Elsa’’s boyfriend and she still live near Spaceport.(F) Malcolm still lives a few miles from Spaceport.(G) Malcolm sold the house and the furniture a few miles from Spaceport and moved to his friend’’s in Florida.(H) Malcolm has move to New York.
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填空题

一个完整的生命周期包括（）、（）、（）、和（）。
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