机舱以后的压载支管布置在：（）

A.双层底内

B.内底板上

C.管隧内

D.轴隧内

According to some scientists, the computer will do much harm to people's health as smoking and drugs do.

A．does much harm...smoking

B．will do as much harm...cigarettes

C．will do so much harm...smoking

D．does as much harm...cigarettes