问题 单项选择题

下列不属于数据定义语言的是()。

A.ALTER

B.INSERT

C.CREATE

D.CREATE INDEX

答案

参考答案:B

解析:IEEE-1284标准为个人计算机的并行接口提供了高速访问手段,该标准提供的数据传输速率比传统的并行接口访问速率要快50至100倍,并能做到完全与现有的并行辅助设备兼容。1284标准定义了5种数据传输方式,每种方式又都可分为正向方式、反向方式和双向方式。

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Bernstein had been appointed Assistant Conductor for the New York philharmonic only a few months before that night. Just 25 years old, he was relatively inexperienced. At the last minute, Bernstein was told he was to take Walter’s place, so he didn’t have any time to rehearse(排演). The music he was going to conduct was very difficult. Plus, the concert was going to be broadcast nationally on the radio. Despite all these pressures, Bernstein rose to the occasion and received a standing ovation(长久的鼓掌)at the end of the concert. The event made national headlines, and Bernstein became famous overnight.

Some people feel they do their best under the most stressful circumstances. What was it about Leonard Bernstein that made him do so well in such a difficult situation?

Perhaps Leonard Bernstein did so well because music was his devotion. The son of a man who supplied hairdressing products, Bernstein became interested in music at the age of 10. By the time he was a teenager, he was performing in public. He became a soloist of the Boston Public School Orchestra, and for 13 weeks in 1934, he played classics on the radio.

小题1:The underlined word “break” in the first paragraph means “__________”.

A.rest

B.chance

C.pause

D.gap小题2:Which of the following statements is NOT true according to the second paragraph?

A.The concert Bernstein was to play at was going to be broadcast nationally on TV.

B.The music Bernstein was going to conduct was very difficult.

C.When Bernstein was told he was to take Walter’s place, he had no time to practice the performance.

D.Before his performance as a conductor, Leonard Bernstein had little experience.小题3:Leonard Bernstein was successful at the concert because of __________.

A.the wonderful music

B.the stress of the circumstances

C.his devotion to music

D.Bruno Walter’s absence小题4: From the last paragraph, we can learn that __________.

A.Leonard Bernstein was very clever

B.Leonard Bernstein’s parents worked hard

C.chances are important to a famous person

D.early interest led to Leonard Bernstein’s success小题5:What might be the best title for the text?

A.Leonard Bernstein’s Debut

B.Leonard Bernstein’s Life

C.A Young Soloist

D.A Great Conductor