A.not；but
B.neither；nor
C.either；or
D.not only；but also
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A.atmosphere
B.the fresh water
C.compressed air
D.chemical compounds
A.fuel treatment
B.fuel combustion
C.fuel injection
D.fuel separating
A.bottle
B.injector
C.piston
D.barrel
A.a separate motor
B.a cam
C.a generator
D.a chain
A.has begun
B.takes place
C.occurs
D.happens
最新試題
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