单项选择题
The pressure of pilot air is usually （） than that of starting air.
A.higher
B.lower
C.low
D.high
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相关考题
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单项选择题
The power generated in the turbine must （） that required by the compressor.
A.be less than
B.be larger than
C.be as large as
D.not be so large as -
单项选择题
The position of the piston parts in relation to each other is secured by means of （） and a dowel pin in the crown.
A.bosses
B.through bolts
C.machine-turned recesses
D.long studs -
单项选择题
The position of the piston parts in relation to each other is secured by means of （） in the crown.
A.a mark
B.a bolt
C.a dowel pin
D.a measuring tool
