ZD(J)9系列电动转辙机齿轮的润滑:在转辙机齿轮动作时时对齿轮及摩擦联结器的带槽齿轮涂润滑脂。()
参考答案:错
— What's the matter, Wang Lei?
— _____. [ ]
A. It looks bad
B. Let's go to see the doctor
C. I'm happy
D. My leg hurts
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