单项选择题

The three basic parts of any eductor are the nozzle, the suction chamber, and the （）.

A.injector
B.compressor
C.diffuser
D.siphon

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单项选择题

A.Should knocking occur
B.If knocking occur
C.Should if knocking occurs
D.If occur knocking

单项选择题

单项选择题

A.the peak pressure in a cylinder
B.the temperature of the cooling water
C.the fuel consumption
D.none of the above