单项选择题
A.a bridge gauge B.a micrometer C.a thermometer D.a indicator
The burning of the fuel adds more heat to the air charg...
单项选择题The burning of the fuel adds more heat to the air charge, causing it to expand and force the engine piston to do work on the crankshaftWhat does “it” mean in this sentence?（）
A.the burning B.the fuel C.the air charge D.the engine piston
The bore of each cylinder is formed in a liner which ca...
单项选择题The bore of each cylinder is formed in a liner which can be （） when worn out.
A.welded B.replaced C.drilled again D.bored
The bed-plate is secured in the longitudinal direction ...
单项选择题The bed-plate is secured in the longitudinal direction by means of bolts known as （）.
A.end-chock bolts B.side-chock bolts C.through bolts D.tie rods
