正确答案: B

错误

题目：藻类植物都是单细胞或多细胞。( )

解析：B

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举一反三的答案和解析：

[单选题]二细胞(二核)时期的花粉粒含有( )。

一个生殖细胞和一个营养细胞

[单选题]—Why do you want to work for our company?—This is the job that I _______for.

have been looking

[单选题]6l. From the third paragraph, we know that __

oxen are treated as human in some areas of China

[单选题]蕨类植物的精子皆为多鞭毛，受精过程离不开水。( )

错误

[单选题]Nowadays people sometimes separate their waste to make it easier for it ( ) .

to be reused

[单选题]

[单选题]

solution

[单选题]绿藻的载色体与高等植物的叶绿体所含色素相同，主要色素种类有叶绿素a、叶绿素b、胡萝卜素和叶黄素。( )

正确

[单选题]根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。I was ten when I first sat with my grandmother behind the cashier(收银台) in her general store. ______71_______ I quickly learned the importance of treating customers politely and saying “thank you.”At first I was paid in candy. ________72______ I worked every day after school, and during the summer and no weekends and holidays from 8 a.m. to 7 p.m. My father helped me set up a bank account. ________73________

Before long, she let me sit there by myself.