问题 选择题

如图所示,某植物的绿叶经光照24小时后,然后脱色用碘处理,结果有锡箔覆盖的位置不呈蓝色而不被锡箔覆盖的部位呈蓝色。该实验证明  

①合理作用需要叶绿素②光合作用需要光③光合作用放出氧气④光合作用制造淀粉

[ ]

A.①④

B.②④

C.②③

D.①③

答案

答案:B

阅读理解

阅读理解。

     We see money almost every day. With money the world becomes a big moving system (系统).

People work to get money. Then they use their money to buy things they want. Money travels from

person to person and from place to place.

     Money is usually coins and notes (纸币). Each country has its own currency (货币). Some have

their leaders' heads on the coins and notes, others have plants or animals. Still others have beautiful or

historical places on the front or the back of their currency. So you see,money also says something

about the culture of a country.

    The Queen's money

    British people use different kinds of coins. They have 1 penny, 2 pence, 5 pence, 10 pence, 20

pence, 50 pence, 1 pound and 2 pound coins. One pound is a hundred pence.

    Symbols of a culture

    The U.S. currency is the most widely used one in the world. There are $ 1,  $ 2,  $ 5, $ 10, $ 20,

$50 and $ 100 notes. They have American leaders' heads on the front and signs on the back..

     Chinese currency in your pocket

     On the front of the fifth set (套) of banknotes there is the head of Chairman Mao Zedong. On the

back there are different sights. They show that China is a big and beautiful country. If you look carefully,

you'll see characters from the languages of different minority groups (少数民族) on the back.

1. What do people use money to do?     

A. To buy things they want.                

B. To show their leaders' heads.

C. To have plants or animals.               

D. To tell their culture.

2. What can money be used as?

A. Symbols of the culture of a country.       

B. History of a country

C. Sights of a country.                    

D. Languages of a country.

3. How many kinds of coins do British people have?

A. 2.             

B. 3.            

C. 6.               

D. 8.

4. Which currency is the most widely used in the world?     

A. British currency.                      

B. Chinese currency.

C. The U.S. currency.    

D. All the above.

5. What might not be on the banknotes?     

A. Leaders' heads.                       

B. Historical places .     

C. Plants and animals.                   

D. A big country.

单项选择题