单项选择题
A.jacket water B.make-up water C.boiler water D.flushing water
The cooler as the liquid becomes, （）.A.the faster it wi...
单项选择题The cooler as the liquid becomes, （）.
A.the faster it will evaporate B.the slower it will condense C.the slower it will evaporate D.the faster it will flow
The connecting rod large end bearing shell generally ha...
单项选择题The connecting rod large end bearing shell generally has tags for location and oil grooves round the center of its axial length which correspond with grooves in the （） through which oil is transmitted up the rod to lubricate the small end.
A.connecting rod B.piston rod C.bearing housing D.none of the above
The conclusion that mechanical efficiency is always （） ...
单项选择题The conclusion that mechanical efficiency is always （） 100 percent is correct.
A.small than B.more than C.little than D.less than
