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【单选题】
到目前为止，全世界没有一个豆类蔬菜品种是一代杂种。豆类蔬菜没有利用杂种优势的原因并不是由于（ ）。A.
没有适宜的杂交制种方法、杂交率低
B.
落花落果严重、繁殖系数低
C.
太复杂、且具有受精习性
D.
杂种优势不明显
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皮皮学刷刷变学霸
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【简答题】paint
【简答题】I thought the party i was invited to was a quiet and private one, but as it turned out,I the crowds and noise.(overwhelm)
【简答题】paint
【简答题】paint
【单选题】I thought the party I was invited to was a quiet and private one, but as it turned out, I was______ by the crowds and noise.
A.
overflowed
B.
overturned
C.
overlooked
D.
overwhelmed
【简答题】I thought the party I was invited to was a quiet and private one, but as it turned out, I the crowds and noise. (overwhelm)
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