问题 问答题

按要求书写化学方程式:

①赤铁矿冶炼成铁的主要反应原理______;

②铁制容器不能用来盛装CuSO4溶液的原因______;

③用稀硫酸除铁锈的原因______;

④化石燃料燃烧会产生CO2,为了减少CO2的排放,科学家将CO2和氢气在催化剂和加热的条件下反应转化为水和甲烷,该反应化学方程式为______.

答案

(1)一氧化碳与氧化铁在高温条件下反应生成铁和二氧化碳.该反应的化学方程式为:Fe2O3+3CO

 高温 
.
 
2Fe+3CO2

(2)铁与硫酸铜反应生成硫酸亚铁和铜.该反应的化学方程式为:Fe+CuSO4=FeSO4+Cu.

(3)硫酸与氧化铁反应生成硫酸铁和水,化学方程式为:Fe2O3+3H2SO4═Fe2(SO43+3H2O.

(4)二氧化碳和氢气反应的化学方程式为:CO2+4H2

催化剂
.
CH4+2H2O.

故答案为:①Fe2O3+3CO

 高温 
.
 
2Fe+3CO2

②Fe+CuSO4=FeSO4+Cu

③Fe2O3+3H2SO4═Fe2(SO43+3H2O.

④CO2+4H2

催化剂
.
CH4+2H2O.

填空题
阅读理解

阅读理解。

    ① The Dream It is everyone's dream to work at home or not work at all. You can plan your own hours

and work when you want to. There is no more rush hour and no hours that people waste when they get to

and from a job every day.

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and make money when you need to. There are plenty of opportunities for you to make money at home, just

by using your computer and the Internet.

    ③ Start Today! Educate yourself, look closely into all the opportunities and decide on what works best

for you. It will not happen during one night, but you can make the decision today and start to make it happen

today.

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Are you using it to make money? Most of these blogs and website owners are not. But you can do that!

    ⑤ _____ When you have your computer and the Internet working for you, your businesses will be working

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1. In which part of a newspaper would you most probably read this passage? [ ]

A. Sports

B. News

C. Business

D. Foreign

2. What does the underlined word "attained" in Point ② mean? [ ]

A. Broken

B. Realized (实现)

C. Lost

D. Destroyed

3. What's the best title for Point ⑤? [ ]

A. Sleep 24 Hours a Day

B. Make Money Every Moment

C. Play All Day Long

D. Travel Around the World

4. Which of the following is NOT TRUE according to the passage? [ ]

A. People can plan their own time when they work at home.

B. People can even use their blogs to make money.

C. People need a lot of money to start a stay-at-home business.

D. People can make the best decision and start to make it happen today.

5. How is the passage organized? [ ]

A. By showing a topic and giving solutions.

B. By giving reasons only.

C. By using famous people's words.

D. By telling old stories.