选择题：（）Is the period when corn needs the most amount of fertilize

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题目内容：

（）Is the period when corn needs the most amount of fertilizers and the intensity of fertilizers is the greatest in this life.During this period， top dressing must be strengthened to prevent the phenomenon of defertilization.

A.V6

B.V12

C.V3

D.VT

参考答案：

The main functional leaf layer of maize in the middle and la

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Millet is （）.

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