下列关于植物激素的叙述，错误的是

【名词&注释】

马铃薯(potato)、脱落酸(abscisic acid)、赤霉素(gibberellin)、叶绿素a(chlorophyll a)、光合产物、细胞分裂(cell division)、高等植物(higher plants)、卵细胞(egg cell)

[单选题]下列关于植物激素的叙述，错误的是

A. 根尖能够产生细胞分裂^{(cell division)}素 脱落酸能抑制马铃薯发芽 生长素的化学本质是蛋白质 赤霉素施用过多可引起水稻植株疯长

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学习资料：

[单选题]—How about your journey to Mount Emei ?—Everything was wonderful except that our car _________ twice on the way .

A. slowed down
B. broke down
C. got down
D. put down

[单选题]It can be interred that without gravity .

A. buildings and other structures would float away
B. trees and buildings would not so easily fly off
C. something around your head would not float away
D. everything outside buildings would fly off into space

[单选题]What is an advantage of the buildings meeting the Green Communities Standards?

A. Lower running costs.
B. Costing less in construction.
C. Less air to be lost in hot days.
D. Better prices for homeless people.

[单选题]46___________

A. address
B. sigms
C. notiees
D. guidanc

[单选题]卵细胞^{(egg cell)}具有高度的极性。( )

A. 正确
B. 错误

[多选题]在绿藻门的下述特征中，( )与高等植物^{(higher plants)}特征相同。

A. 叶绿素a和b
B. 尾鞭型鞭毛
C. 接合生殖
D. 光合产物为真淀粉

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