It is necessary for her to ()(执行) the general day-to-day repair on board.
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A sidereal day is approximately how much shorter than a solar day?()
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A sidereal day is shorter than a solar day. This difference is due to().
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关于DAY法描述正确的是()
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()every day for 20 minutes.
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Nice day,()? Yes, it is.
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Have a good day!()
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“first day cover”译成中文是()
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first day cover 的中文意思是()。
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