问题 选择题

下列各组物质:①C+O2,②NH3·H2O +SO2,③Cu+HNO3,④Cl2 +FeBr2,⑤Fe+HCl,⑥Zn+ H2SO4,⑦NaHCO3+HCl,⑧Fe +Cl2,在不同条件下(浓度、温度或用量)反应,能得到不同产物的是[ ]

A.①②③④⑥

B.①②③④⑤⑥⑦⑧

C.②④⑥⑧

D.①③⑤⑦

答案

答案:A

阅读理解

阅读理解。

     You may have this question:where are we getting all the materials for our products? Two words-natural resources  (资源). Natural resources are items we find in the environment. There are two types of natural

resources:renewable   (可再生的) and nonrenewable resources.

     Renewable resources are those items that we can get back if weuse them right. For example, when we cut down trees for paper,we can replant new ones. Of course, if we cut down too many trees, destroy the soil and do not replant enough new trees, then we will lose this important natural resource.

     Non-renewable resources must be mined (开采) from the earth. If we start using non-renewable

resources wrongly, then we're going to run out ofthem.

     Remember, God gives us natural resources to use, not to abuse  (滥用)

1. Where can we fmd naturalresources?

A. In the lab.

B. At home.

C. In the products.

D. In the environment.

2. How many types ofnatural resources are there?

A. Two.

B. Three.

C. Four

D. Five.

3. ______ are that we can get back ifwe use them right.

A. All the materials

B. Renewable resources

C.Non-renewable resources

D. Renewable resourcesand non-renewable resources

4. Which of the following is TRUE?

A. Paper is renewable, so we can waste it.

B. We can cut aown too many trees and can't replant them, because they're renewable resources.

C. We need to reduce(减少) our use of natural resources.

D. God gives us natural resources to abuse.

5.What does the passage mainly talk about?

A. Our products.

B. Natural resources.

C. Using non-renewable resources.

D. Planting trees.

选择题