正确答案: A

正确

题目：通过根的成熟区做一横切，可以观察到根的初生结构。( )

解析：A

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举一反三的答案和解析：

[单选题]Suppose and English couple whose ancestors lived near a leafy forest wanted their new-born son to become a world leader, the baby might be named _______.

Donald Greenwood

[单选题]According to the last paragraph, it is important to____________.

eat something for breakfast