动物细胞中的能量转换器是（） ①液泡　 ②染色体 ③线粒_爱下问搜题

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问题选择题

动物细胞中的能量转换器是（　　）

①液泡　

②染色体　　

③线粒体　　

④叶绿体．

A．①②

B．③

C．③④

D．②④

答案

线粒体是广泛存在于动物细胞和植物细胞中的细胞器，是细胞进行呼吸产生能量的主要场所．叶绿体是绿色植物细胞中广泛存在的一种能量转换器，是植物细胞进行光合作用的场所．因此，叶绿体和线粒体是细胞中的能量转换器．动物细胞中只有线粒体，植物细胞中有线粒体和叶绿体．

故选：B

阅读理解

Read and judge. 阅读短文，判断正(T)误( F)。

I’m Jim. I’m a student. At school, P. E. is my favourite subject. Because I like to play basketball,

football and ping-pong. Mr. Green teaches us P. E. He is tall and strong. He is twenty-five years old.

He teaches very well. We have P. E. on Mondays, Wednesdays and Fridays. His favourite colour is

red. He also likes fruit and vegetables. But he doesn’t like meat.

( ) 1. Jim’s favourite subject is art.

( ) 2. Jim likes to play ball games.

( ) 3. Jim doesn't have P. E. on Tuesdays and Thursdays.

( ) 4. Jim’s P. E. teacher is tall but thin.

( ) 5. Mr. Green likes fruit, vegetables and meat.

单项选择题

6，24，60，120，( )

A．120

B．210

C．240 1

D．480