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【判断题】
把曲轴转1圈(360°),活塞在汽缸内上下往复运动四个行程,完成一个工作循环的内燃机称为二冲程内燃机。A.
正确
B.
错误
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举一反三
【单选题】_____ our S/C No.301, we wish to say that the goods will be shipped by Oct. l0th.
A.
Referring
B.
Refer to
C.
With reference to
D.
With refer to
【单选题】____our S/C No.301,we wish to say that the goods will be shipped by Oct.10.( )
A.
Referring
B.
Refer to
C.
With reference to
D.
With refer to
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