问题 选择题

下列甲乙丙丁四个图分别表示有关生物学过程,对曲线变化的描述中,不正确的是

[ ]

A.甲图B点时若为茎背光面的生长素浓度,则C点不可能为茎向光面的生长浓度

B.乙图A点时,害虫不存在抗药性个体,而B点时害虫存在抗药性个体

C.丙图表示肠脂肪酶的活性受pH影响的示意图

D.丁图曲线A点时,人的胰岛A细胞兴奋性增强,胰岛B细胞兴奋性随后增强

答案

答案:B

阅读理解

阅读理解。

     Television has a huge influence on our lives. It is one of the most important ways of getting information.

People spend part of their spare time watching television, and much of what they learn comes from it.

     What we see on TV - movies,news shows, sports shows, advertisements and so on have increased our

knowledge and have changed the way we learn about the world today. However, not everything on TV is true.

     Most of the viewers (观众) are children. Television sometimes is like a baby-sitter. It spends more time

with children than parents do. But it keeps them in the living room away from healthy outdoor activities. They

spend less time playing soccer or walking in the park or playing games in the yard.

     Of course, there are some programs on TV that are good for children. But there are also some shows

which are bad. Children should not watch unhealthy shows. Maybe we can't change what is on TV, but we

can choose what we watch. Do you agree?

1. According to the passage, ________ is one of the most important ways of getting information.

A. a book

B. a computer

C. TV

2. ________ can't be got on Television.

A. Knowledge

B. Sports news

C. Computer games

3. The underlined word "baby-sitter" means ________.

A. 小妹妹

B. 保育员

C. 女婴

4. What can we do with programs on TV?

A. We can surely change them.

B. We can do nothing.

C. We can choose them.

5. From the passage, we may know ________.

A. TV is both good and bad for children.

B. Everything is true on TV.

C. All programs on TV are suitable for children.

单项选择题