正确答案: D

内、外切向壁

题目：双子叶植物具凯氏带的内皮层细胞不带状增厚的部分是( )。

解析：D

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举一反三的答案和解析：

[单选题]

Instead

[单选题]What do you mean, there are only ten tickets? There _____ be twelve.

shouldB .would

[单选题]种子萌发时所谓“出芽”就是指种子已露出“胚芽”。( )

错误

[单选题]What can students do in the practical areas?

Attend workshops.

[单选题]The Great Wall is _______ tourist attraction that millions of people pour in every year.

such a well-known

[单选题]A good friend of mine from I was born showed up at my home right before I left for Beijing．

whenD．which

[单选题]栀子属于( )科。

茜草科

[单选题]的缘花为管状花，且为雌性。

蒿属