为了保证煤矿的安全生产,对瓦斯浓度进行实时检测与报警时,须选用合适的
A.位移传感器
B.速度传感器
C.湿度传感器
D.气敏传感器
正确答案是D
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Choose the closest paraphrased version after each of the following sentences or the italicized part. Blacken the letter corresponding to your choice on the answer sheet.
We can't call ourselves Christians and then deny safety to