【单选题】
电缆井、电缆隧道内作业过程中应用气体检测仪检查井内或隧道内的___是否超标,并做好记录。
A. 易燃易爆及有毒气体的含量
B. 易燃易爆气体的含量
C. 有毒气体的含量
D. 一氧化碳含量
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答案
A
解析
暂无解析
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【单选题】
Read this pasaage and answer the five questions
That people often experience trouble sleeping in a different bed in unfamiliar surroundings is a phenomenon known as the “first-night” effect. If a person stays in the same room the following night they tend to sleep more soundly. Yuka Sasaki and her colleagues at Brown University set out to investigate the origins of this effect.
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【单选题】
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