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全真呈现历年考试试题
1、[单选题]______ makes the piston to move up an down in the engine cylinder.
2、[单选题]Pistons for modern engines are made of _______.
3、[单选题]During the power stroke,a force of up to 4000 pounds is suddenly applie
to the piston hea for _______ times a second.
4、[主观题]【英译中】Fuel tank is usually made of sheet steel with rectangular or circular in shape and have a capacity for approximately 270 liters of fuel.
5、[阅读理解]【单词填空题】The ball __________ twice before hitting the net.
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