问题 单项选择题

关于电光分析天平,下列说法正确的是()

A.天平横梁上玛瑙刀刀口的锋利程度对天平的灵敏度无影响

B.天平横梁是天平的主要部件

C.玛瑙刀刀口越锋利,天平越不灵敏

D.祛码是天平的主要部件

答案

参考答案:B

阅读理解

阅读理解。

Here is some news from Dalian Daily.

·President's pet.

     Do you keep a pet? American President Obama does.He calls his new dog Bo.It is six months

 old.The president's family like the dog very much.Look! They are having fun with Bo on the South

Lawn (南草坪)of the White House.The president's daughter, Malia ,is showing the dog off.

·Back on her feet.

     Mosha is a young elephant in Thailand.She lost her right front leg after stepping on a landmine(地雷)

two years ago.She was taken to a hospital and became the first elephant in the world with a prosthetic leg

(假肢).

     Now aged three Mosha is growing up.She is happy to have the new prosthetic leg.

·Liu Xiang

     World champion Liu Xiang returned to Shanghai on March 8.The 25-year -old star had a foot

operation in December in America.It took him three months to recover(康复)and train there.It is

said that some doctors are ready in Shanghai to help with Liu's recovery.Liu left the 2008 Beijing

Olympics because of his foot injury(损伤)last August.

1.The name of the president's dog is          .

A.Washington    

B.Bo    

C.Malia          

D.Obama 

2.How old is the dog?

A.Two months old  

B.Three years old  

C.Six months old  

D.Six years old

3.How did the elephant lose his front leg?

A.She had a traffic accident.        

B.She stepped on the landmine.

C.She was ill.                    

D.She fell into a big hole.

4.Liu Xiang had his foot operation in         .

A.China          

B.America        

C.Japan          

D.Australia

5.Liu Xiang left the Beijing Olympics because       

A.he was afraid of the other players      

B.he was too nervous to take part in it

C.his coach told him to do that          

D.his foot hurt

选择题