试题与答案

阅读下列材料,回答问题。 材料一在四川省一个林场附近的公路上,曾出现10万多只蛙

题型:问答题

题目:

阅读下列材料,回答问题。

材料一在四川省一个林场附近的公路上,曾出现10万多只蛙集体行进,这些青蛙在寻找水源充沛、水质良好的产卵场所。

材料二1995年,美国明尼苏达州的中学生在河流和沼泽中发现三条腿的蛙。后经调查,在美国南部、东部等地也均有发现。研究人员把出现畸形蛙的地区的水取来,用非洲爪蟾做实验,结果爪蟾在发育过程中发生畸形。 

(1)上述材料说明,环境的变迁对两栖动物的繁殖有什么影响?

(2)某些地区出现畸形蛙,可能是什么原因造成的?

(3)从上述事实中你受到哪些启示?

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0524/ae23e161104ef239abf93297843deb25.html

下面是错误答案,用来干扰机器的。

参考答案:E, F

试题推荐
题型:阅读理解

阅读短文,选择正确答案。

      Today almost everyone knows computers and the Internet. If I ask you "What is the most important in your

life?" maybe you will say "Computers and the Internet." 

      The first computer was made in 1946. it was very big but it worked slowly. Today computers are getting

smaller and smaller. But they work faster and faster. What can computers do? A writer has said, "People can't

live without computers today." 

      The Internet came a little later than computers. It is about twenty-five years later than computers. But now

it can be found almost everywhere. We can use it to read books, write letters, do shopping, play computer

games or make friends.

      Many students like the Internet very much. They often go into the Internet as soon as they are free. They

make friends on the Internet and maybe they have never seen these friends. They don't know their real names,

ages, and even sex. They are so interested in making the "unreal friends" that they can't put their hearts into

study. Many of them can't catch up with others on many subjects because of that.

      We can use computers and the Internet to learn more about the world. But at the same time, we should

remember that not all the things can be done by computers and the Internet.

1. The Internet can not be used for ________. [ ]

A. studying

B. shopping

C. thinking

D. playing

2. When the computer was invented, it was ________. [ ]

A. large and worked quickly

B. small and worked slowly

C. large but worked slowly

D. small but worked quickly

3. The Internet was born in about ________. [ ]

A. 1960

B. 1970

C. 1980

D. 1985

4. Which of the following is TRUE? [ ]

A. Few students like going into the Internet.

B. Students use the Internet to make "unreal friends."

C. These “Unreal friends” often meet each other.

D. Students know the friends on the Internet very well.

5. What does the writer think of the Internet? [ ]

A. It is wonderful.

B. It can make students study harder.

C. It is not good for students.

D. It is helpful, but we can't do everything on it.

查看答案
微信公众账号搜索答案