【名词&注释】
最高级(supreme grade)、单子叶植物(monocotyledon)、虫媒传粉(insect pollination)
[单选题]幼根的表皮细胞主要起保护作用。( )
A. 正确
B. 错误
查看答案&解析
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举一反三：
[单选题]Why did David decide to leave school and start working?
A. He received lots of job offers.B． He was eager to help his mother.
B. He lost interest in school studies. D． He wanted to earn his own living.
[单选题]植物的嫁接最容易。
A. 木本
B. 草本
C. 木质藤本
D. 草质藤本
[单选题]姜科植物是单子叶植物虫媒传粉的最高级类型。( )
A. 正确
B. 错误
[单选题]簇生叶序是每个节上生3枚或3枚以上的叶。( )
A. 正确
B. 错误
[单选题]________ many times, he finally understood it.
A. Told
B. Telling
C. Having told
D. Having been told
[单选题]
A. think of
B. give away
C. believe in
D. turn into
[单选题]叶基二裂片向两侧外指，称( )。
A. 耳形
B. 箭形
C. 匙形
D. 戟形
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