问题：
[单选] The joint face between the cylinder cover and the liner is arranged （）the combustion process as possible.
such far away from。such near by。as far away from。as near by。
问题：
[单选] The loss of （） from an air compressor could lead to an overheated air discharge and possibly an explosion in the pipelines leading to the air reservoir.
lubricating oil。compressed air。cooling water。sealing ring。
问题：
[单选] The lower end of each piston rod is reduced in diameter to fit a bore in the （）, this being secured to the piston rod by a nut.
piston gudgeon pin。piston skirt。cross-head。cross-head pi。
问题：
[单选] The lower end of each piston rod is reduced in diameter to fit a bore in the cross-head, this being secured to the piston rod by （）.
a bolt。a cap。a disc。a nut。
问题：
[单选] The lower end of each piston rod is reduced in diameter to fit a bore in （）, this being secured to the piston rod by a nut.
the crank-web。the connecting rod。the main bearing。the cross-head。
问题：
[单选] The lower end of each piston rod is reduced in diameter to fit a bore in （）.
the crosshead。the journals of the crosshead。the crosshead shoes。the guide。
问题：
[单选] The lowest ring of a piston is （）.
a coil spring。a sealing ring。an oil distributor ring。main seal ring。
问题：
[单选] The lubricating oil is pumped from the drain tank, very often with （） in the suction line.
a filter。a strainer。a magnetic filter。a fine strainer。
问题：
[单选] The lubricating pipes and dusts should be blown out with （）.
atmosphere。the fresh water。compressed air。chemical compound。
问题：
[单选] The lubricating system for the cylinder walls is different from the bearings in that the oil for former one is supplied in （） while that for latter one is （）.
sufficient quantity； measured。measured quantity；sufficient。excessive quantity；sufficient。the less quantity the better；the more the better。
