题目内容
A breathing eqiupment is used for_______.
[ ]
A
.protect a fireman from smokeB
.protecting a fireman from smokeC
.stop a fireman from smokeD
.stopping a fireman to smoke
答案:B
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题目内容
A breathing eqiupment is used for_______.
[ ]
A
.protect a fireman from smokeB
.protecting a fireman from smokeC
.stop a fireman from smokeD
.stopping a fireman to smoke