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问题
单项选择题
特快旅客列车、快速旅客列车、旅客快车的客车都应装( )。
A.轴温报警器
B.回火防止器
C.红外线轴温探测网
D.超载警报装置
答案
参考答案:A
选择题
— Mr. Johnson, would you have some more ice-cream?
— No, thanks. It's very good, but I have to _____ weight, you know.
A. increase
B. remain
C. lose
D. gain
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判断题
防除大豆杂草可选用阿特拉津胶悬剂。
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