Breathing equipment is used (A to B with C for D at) protecting firemen from smoke.

分类: 作业答案 • 2022-02-07 12:08:42

问题描述：

Breathing equipment is used (A to B with C for D at) protecting firemen from smoke.
我想选择 A

答

be used to 后加名词表示习惯于
be used with 后加名词表示联用
be used for 后家名词表示用于.
be used at 从未听说过
个人认为答案是C
呼吸设备是用于保护消防员免受烟雾的侵害