單項(xiàng)選擇題The fuel injection system is very important, so any trouble of it will () the operation of the main engine.

A.be affected
B.affect
C.be effected
D.effect


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3.單項(xiàng)選擇題For Vee-form engines, () is shaped to given two slopping surface on which () are placed at the correct relative angle to each other.

A.the bottom of the column;the cylinder blocks
B.the top of the column;the cylinder heads
C.the top of the column;the cylinder blocks
D.the bottom of the column;the cylinder heads

4.單項(xiàng)選擇題As to the low speed diesel engine, if you want to change the coolant flow for a certain cylinder, you can regulate ().

A.the inlet valve
B.the outlet valve
C.both the inlet valve and the outlet valve
D.the pump inlet valve