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培养基上培养着成熟花粉粒,花粉粒附近放一块子房组织。花粉管朝着邻近的子房组织生长,这种生长行为称为( )生长。A.
B.
感性
C.
D.
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【简答题】A thousand years ago Hong Kong was covered by a thick forest. As more and more people came to 1 in Hong Kong, these trees were cut down and burnt. Now there is 2 forest left, though there are still so...
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【简答题】完型填空。 A thousand years age Hong Kong was covered by a thick forest. As more and more people came to __ 1 __ in Hong Kong, these trees were cut down and burnt. Now there is __ 2 __ forest left, though ...
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