问题 填空题

假设用户U1将对表SC的INSERT权限授予了U2,而U2又将其授予了用户U3。现要将U1对表SC的权限收回,请完成下列的SQL语句。
______
ON TABLE SC
______

答案

参考答案:FROM U1 CASCADE

阅读理解

阅读理解。

        On the evening of June 21, 1992, a tall man with brown hair and blue eyes entered the beautiful hall

of the Bell Tower Hotel in Xi’an with his bicycle. The hotel workers received him and telephoned the

manager, for they had never seen a bicycle in the hotel ball before though they lived in “the kingdom of

bicycles.”    

        Robert Friedlander, an American, arrived in Xi’an on his bicycle trip across Asia which started last

December in New Delhi, India.    

        When he was 11, he read the book Marco Polo and made up his mind to visit the Silk Road. Now,

after 44 years , he was on the Silk Road in Xi’an and his early dreams were coming true.     

        Robert Friedlander’s next destinations (目的地) were Lanzhou, Dunhuang, Urumqi, etc. He will

complete his trip in Pakistan.

1. The best headline(标题) for this newspaper article would be ______     .  

A. The Kingdom of Bicycles        

B. A Beautiful Hotel in Xi’an   

C. Marco Polo and the Silk Road  

D. An American Achieving His Aims

2. Friedlander is visiting the three countries in the following order, _______   .  

A. China, India, and Pakistan    

B. India, China, and Pakistan   

C. Pakistan, China, and India    

D. China, Pakistan, and India

3. What made Friedlander want to come to China?  

A. The stories about Marco Polo .

B. The famous sights in Xi’an .  

C. His interest in Chinese silk.  

D. His childhood dreams about bicycles .

4. Friedlander can be said to be _______      .  

A. clever    

B. friendly    

. hardworking

D. strong-mindedC

判断题