问题 单项选择题 A1/A2型题

绝大多数Ⅱ类限制酶识别长度为()。

A.4或6个核苷酸

B.5或6个核苷酸

C.6或7个核苷酸

D.7或8个核苷酸

E.6或9个核苷酸

答案

参考答案:A

阅读理解

     阅读理解。

     If someone says to you: "give me five", do not search your pocket to get five yuan! It will make others

  laugh! The person's not asking for your money, but your fingers.

     In the US, "give me five" or "give me the high five" is a popular gesture (动作). You can see it often in

 films or on TV. It means the slapping (拍) of each other's raised (举起的)  right hands together.

     People do it when they meet for the first time or something happy happens.  For example, a student

 has good marks in exams or wins a lottery ticket ( * * ). If a football team wins a game, the players will

 give high five to everyone around to celebrate.

     This gesture may come from the old Roman gesture of raising the right arm for the emperor (皇帝).

 This showed that the person raising his arm did not have a sword (JJ)  in his hand. Why not try to give

 the  high five to your friends?

1. "Give me five" is a gesture to _____.

    A. make people laugh                      

    B. ask for money

    C. celebrate success                    

    D. search one's pocket

2. The gesture "give me five" is the clapping of _____.

    A. toes          

    B. hands        

    C. arms          

    D. legs

3. When you _____, you give your friends high five.

    A. lose your money                          

    B. go back home

    C. win a football game                      

    D.  do badly in exams

4. The gesture started in _____ according to the story.

    A. Rome        

    B. America    

    C. China        

    D. Britain

5. Why did the Romans raise the right arm for the emperor? Because _____.

    A. they were proud of their emperor

    B. they were happy to see the emperor

    C. they wanted to show there were no swords in their hands

    D. we don't know

选择题