[单选题]() at the end of the distribution pipe ensures that adequate pressure is maintained by the pump.A . A relief valveB . An alarmC . A pressure gaugeD . A non-maim valve
[问答题] 末端治理的缺点有哪些?
[名词解释] 下管pipe sinking
[主观题]清洁生产通过末端治理来实现。此题为判断题(对,错)。
[单选题]The outside diameter of the pipe is () the diameter of the bore of the piston rod, the result being that an annular space formed between the piston rod and the pipe.A . less thanB . greater thanC . equal toD . twice larger tha
[单选题]Itseemsoil________fromthispipeforsometime.We’llhavetotakethemachineaparttoputitright.A.)hadleakedB)isleakingC)leakedD)hasbeenleaking
[判断题] 清洁生产通过末端治理污染来实现。A . 正确B . 错误
[问答题] 简述清洁生产和末端治理的区别。