A.radially from the shaft
B.parallel to each other and to the shaft
C.parallel to each other but at a right angle to the shaft
D.at an angle to each other and to the shaft
第1题
A.auto-ignition point
B.flash point
C.burning temperature
D.fire point
第2题
A.prevent the gear box from leaking
B.prevent the oil from becoming inflammable
C.make sure it has not become contaminated
D.make sure the motor bearings are lubricated
第3题
A.fuel spray; the burning of the fuel
B.the burned gas mixture; connecting rod
C.medium shaft; crankshaft
D.the burned gas mixture; piston rod
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