【名词&注释】
凯氏带(casparian strip)、向日葵属(helianthus)、双子叶植物(dicotyledon)、内皮层细胞(endodermal cells)
[单选题]双子叶植物具凯氏带的内皮层细胞(endodermal cells)不带状增厚的部分是( )。
A. 左、右径向壁
B. 上横壁
C. 下横壁
D. 内、外切向壁
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举一反三：
[单选题]
A. Therefore
B. Besides
C. Instead
D. Otherwise
[单选题]What do you mean, there are only ten tickets? There _____ be twelve.
A. shouldB .would
B. will D． shall
[单选题]种子萌发时所谓“出芽”就是指种子已露出“胚芽”。( )
A. 正确
B. 错误
[单选题]What can students do in the practical areas?
A. Take science courses?
B. Enjoy excellent meals.
C. Attend workshops.
[单选题]The Great Wall is _______ tourist attraction that millions of people pour in every year.
A. so a well-known
B. a so well-known
C. such well-known a
D. 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．
A. howB．whom
B. whenD．which
[单选题]栀子属于( )科。
A. 桔梗科
B. 茜草科
C. 芸香科
D. 忍冬科
[单选题]的缘花为管状花，且为雌性。
A. 菊属
B. 蒿属
C. 向日葵属
D. 苍耳属
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