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43.将在黑暗中放置一段时间的叶片均分4块,置于不同的试管中,按下表进行实验,着色
最浅叶片所在的试管是
注:“+”表示具有该条件。
A.① B.②
C.③ D.④
D.塔里木河处于丰水季节
参考答案
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D |
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B |
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