A.one
B.two
C.three
D.four
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A.more；more
B.more；less
C.less；more
D.less；less
A.transmitter
B.tele-motor
C.hydraulic ram
D.hydraulic cylinder
A.by which
B.to which
C.in which
D.at which
A.inside；associated
B.inside；not associated
C.outside；associated
D.outside；not associated
A.fuel-air ratio
B.compression ratio
C.fuel rack
D.viscosity index
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