依据《水利工程建设安全生产管理规定》水行政主管部门或者流域管理机构委托的安全生产监督机构，负责水利工程施工现场的具体监督检查工作。
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进入汽缸的空气经过压缩行程后，其特性变化为（）。
A. 压力和温度升高
B. 压力和温度降低
C. 压力升高，温度降低
The time of discharging oil is short, but oily water separator discharges oil frequentlyThe possible reason is （）
A. the sensor of low oil level is fully covered by sludge
B. the coarse strainer before the pump in suction system is clogged
C. the screw pump is worn seriously and volumetric efficiency is decreased
D. bilge suction value is clogged
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