A、A.crankshaft
B、B.piston
C、C.connecting rod
D、D.bearing
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A、play a great part on B、run a role in C、plays an important part in D、acts as important part at
A、Essential DC bus(Using the TRU) B、Essential AC bus(Using the E-inverter) C、Essential DC bus(Using the TRU)和Essential AC bus(Using the E-inverter) D、Essential DC bus(Using the E-inverter)和Essential AC bus(Using the TRU)
A、the ship security plan B、the company security plan C、the port security plan D、the national security plan
A、by opening the separator manually B、by separating the lower part from the upper part automatically C、by separating the upper part from the lower part automatically D、continuously
A、last part of the exhaust stroke, and the first part of the intake stroke B、last part of the intake stroke only C、early part of the injection stroke only D、early part of the power stroke
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A、all of the parts，dividing the load equally B、the hauling part because it must absorb the frictional losses of all the sheaves C、the parts in the movable block D、the standing part because it is directly connected to the weight
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