问题 选择题

设x∈R,则“x2-3x>0”是“x>4”的(  )

A.充分而不必要条件

B.必要而不充分条件

C.充分必要条件

D.既不充分也不必要条件

答案

由x2-3x>0可解得x<0或x>3,

因为集合{x|x>4}是集合{x|x<0或x>3}的真子集,

故“x2-3x>0”是“x>4”的必要不充分条件,

故选B

填空题
阅读理解

D

Here are three notices on the school bulletin board.

Chinese Prints

This exhibition starts on January 3 and ends on January 21.

At 6:00 p.m. on Friday, 4 January, there will be a talk on Chinese painting by Professor Li Yan in the Yingdong Gym.

Opening times: Mon — Fri, from 8: 00 am to 5: 00 pm Place: the School Library  Ticket:  Free

The Day after Tomorrow

American movie    Director: Roland Emmerich

Cast (in credits order):  Jack Hall, Laura Chapman, Jason Evans   Place:  the Hua Xing Cinema

Time: 10: 00 am, 6: 30 pm; Saturday, December 21    Ticket: ¥ 20

Piano Concert

Chinese pianist: Li Yundi — the winner of the Fourteenth International Chopin Competition in Warsaw

Place:  the Centre Theatre   Time:  7: 00 pm, January 25, 2008  Ticket: ¥150, ¥250, ¥350

For more information, please come to Students Union.

48. Students can visit the Exhibition of Chinese Prints on _________.

A. January 3              B. December 21          C. Saturday                  D. Sunday

49. If you want to see the American movie The Day after Tomorrow, you will pay ________.

A. ¥ 20             B. ¥150                      C. ¥250                     D. nothing

50. If you want to attend Li Yundi’s piano concert, you will go to _______.

A. the School Library                              B. the Hua Xing Cinema  

C. the Centre Theatre                           D. the Yingdong Gym