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【简答题】
种子一般分为哪两种类型？水稻、小麦、玉米、花生、黄豆、板栗的种子各属于什么类型？
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举一反三
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before
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since
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A.
when
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that
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until
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【单选题】It was some time________we realised the truth. [ ]
A.
when
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until
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