—It's very cold outside. —Oh, yes. You'd_爱下问搜题

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问题选择题

—It's very cold outside.

—Oh, yes. You'd better your coat. [ ]

A. put on

B. put away

C. put back

D. put up

答案

答案：A

选择题

— Have you ever been here before?

— This is the second time I________to the Great Wall.[ ]

A. comes

B. have been

C. came

D. had come

单项选择题

过热器爆管时，（）。

A.排烟温度明显升高，烟气颜色变灰

B.排烟温度明显下降，烟气颜色变白

C.排烟温度明显升高，烟气颜色变青

D.排烟温度明显下降，烟气颜色变青