[题目]人类生存需要清洁的空气.下列情况不会造成环境污染的是( ).A．燃放烟花 B．汽车尾气C．煤炭燃烧 D．光合作用题目和参考答案——青夏教育精英家教网—

精英家教网 > 初中地理 > 题目详情

【题目】人类生存需要清洁的空气。下列情况不会造成环境污染的是( )。

A．燃放烟花 B．汽车尾气

C．煤炭燃烧 D．光合作用

【答案】D

【解析】

试题分析：光合作用吸收二氧化碳，放出氧气，不会造成环境污染。

练习册系列答案

年级	高中课程	年级	初中课程
高一	高一免费课程推荐！	初一	初一免费课程推荐！
高二	高二免费课程推荐！	初二	初二免费课程推荐！
高三	高三免费课程推荐！	初三	初三免费课程推荐！
更多初中、高中辅导课程推荐,点击进入>>

相关习题

科目：初中地理 来源： 题型：

【题目】C

Today almost everyone knows computers and the Internet. If I ask you ＂What is the most important thing 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 25 years later than computers. But now it can be found almost everywhere. We can use it to read books, send e-mails, do some shopping, play games or make friends.

Young men, especially the middle school students like the Internet very much. They often go into the Internet bars 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 names, ages and sex. They are so interested in making the ＂unreal friends＂ that they can’t put their heart into study. Some of them play the games in the Internet bars all day and all night. Many of them can’t catch up with others in many subjects because of that.

Now the government has done many things. Some gangster Internet bars(黑网吧) have been banned. But that’s not enough. The teachers and parents are still worrying about their students and children.

We can use computers and the Internet to learn more about the world. But at the same time, we should remember that computers and the Internet could not do all the things.

【1】 How was the first computers?

A. It was not big. B. It couldn’t work fast. C. It was very cheap. D. It was no useful.

【2】When did people begin to use the Internet?

A. In the 19th century. B. In the 1980s. C. In the 1970s. D. In the 1960s.

【3】Which of the following is true?

A. Computers can help people do everything.

B. Middle school students aren’t allowed to use the Internet.

C. Some students have used the Internet bars to make the ＂unreal friends＂.

D. computer isn’t good to students.

【4】Which is the best title of the passage?

A. Computers and the Internet. B. The Greatest Invention of This Century.

C. Gangster Internet Bars. D. How to use the Internet

【5】What’s the meaning of the word ＂that＂ in the fourth paragraph?

A. Students often go into the Internet bars as soon as they are free.

B. And they play the games in the Internet bars all day and all night.

C. Students are so interested in making the ＂unreal friends＂ that they can’t put their heart into study.

D. All of above.

查看答案和解析>>

科目：初中地理 来源： 题型：

【题目】假如你是Dave，给你的朋友Jack写便条，请他把你房间的四样东西给你带来，这些东西及位置如下：在沙发上的钥匙；在书柜上的书；在椅子下的棒球,在抽屉里的光盘。

Dear Jack ,

________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

________________________________________________________________________________________________________________________________________________________________________

查看答案和解析>>

科目：初中地理 来源： 题型：

【题目】下列事例中，能增大压强的是（）

A、把书包带做得宽些 B、在坦克的轮子上安装履带

C、刀、斧、剪的刃磨得很薄 D、在铁路的钢轨下铺上枕木

查看答案和解析>>

科目：初中地理 来源： 题型：

【题目】下列关于空气成分的叙述正确的是( )。

A．空气中氮气和氧气的体积比约为4∶1

B．空气的成分按质量计算，氮气占78%，氧气占21%

C．从液态空气中能分离出氮气，不能分离出氧气和稀有气体

D．空气中含量最多且性质又不活泼的是稀有气体