（） at the end of the distribution pipe ensures that adequate pressure is maintained by the pump.

[名词解释] 末端治理（End-of-Pipe Control）

[单选题]英语PIPE指（）A .放大器B .铁管C .气管D .通气孔

[名词解释] 下管pipe sinking

[单选题]Itseemsoil________fromthispipeforsometime.We’llhavetotakethemachineaparttoputitright.A．)hadleakedB)isleakingC)leakedD)hasbeenleaking

[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]“Before disconnecting the oil pipe, would you flush the oil retained in the pipe?” asked the oil barge owner （）A . by using of fresh waterB . with compressed airC . by using of sea waterD . with chemical compound

[名词解释] 1ead- pipe rigidity

[单选题]Compared to a normal distribution, a lognormal distribution is least likely

[单选题]What dose “End” at the end of the letter mean?A． Something attached to the letter.B． A complaint to the toy company.C． A hidden messageD． An encouraging response.

[单选题]A hot air start pipe indicates that there is （）.A . inefficient coolingB . a leaking air start valveC . a clogged drain valveD . a leaking air bottle