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【单选题】

When the starting air valve closes on one cylinder, another starting air valve has () opened on another cylinder whose piston has just commenced its downward stroke.

A、just

B、nearly

C、merely

D、already

更多“When the starting air valve closes on one cylinder, another starting air valve has () opened on another cylinder whose piston has just commenced its downward stroke.”相关的问题
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第2题

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第4题

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第5题

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第6题

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第7题

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第8题

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第9题

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第10题

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