单项选择题
A.should be scraped B.should be derusted C.should be drilled out D.to be brushed off
The cap and new shell are tightened up and then removed...
单项选择题The cap and new shell are tightened up and then removed and the thickness of the wire measured by （）.
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
