一系弹簧组两侧的螺栓，其作用是将弹簧组拉紧，方便弹簧组的拆、

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问题判断题

一系弹簧组两侧的螺栓，其作用是将弹簧组拉紧，方便弹簧组的拆、装。

答案

参考答案：对

改错题

单句改错。
1. What are you going to do that? 2. Bob wants to be a actor when he grows up. 3. Jim is going to' move interesting somewhere. 4.I'm going to retired at the age of sixty. 5. Tom is going to get a part-time work.	_________ _________ _________ _________ _________

单项选择题

我国饮用水标准含氟量是（）

A.0.1ppm

B.0.5ppm

C.0.5～1.0ppm

D.1.0～1.5ppm

E.1.0ppm