单项选择题
A.less than B.lighter than C.larger than D.smaller than
The external circumference of a pair of main bearing sh...
单项选择题The external circumference of a pair of main bearing shells is slightly （） that of the bore of the housing which receives them Whats the meaning of “that” in the sentence above？
The exhaust gases for a new engine should be （） when th...
单项选择题The exhaust gases for a new engine should be （） when the engine operates under full load.
A.smoky B.a little bit dense C.visible D.almost invisible
The engine will fail to start unless （）.A.the pressure ...
单项选择题The engine will fail to start unless （）.
A.the pressure of the starting air is high enough B.there is enough air in the air reservoirs C.the air is supplied into the cylinders in the appropriate sequence D.all of the above
