[单项选择]A) A teacher. C) A worker.
B) A secretary. D) A policeman.

[单项选择]A) A teacher. C) A worker.
B) A secretary. D) A policeman.

[填空题]Some researchers admit that the first female secretary of state, the first female lead anchor of a nightly newscast, the first female president of Princeton, and, next month, the first female speaker of the House are some achievements representing the improved status of the women.

[简答题]After years of fierce lobbying and months of secrecy, Beijing unveiled five mascots for the 2008 Olympics on Friday, opening a marketing blitz that is expected to reap record profits. In an elaborate, nationally televised gala at a Beijing sports arena to mark the 1,000-day countdown until the Games, senior Chinese leaders introduced the mascots—cartoon renditions of a panda, fish, Tibetan antelope, swallow and the Olympic flame, each one the color of one of the Olympic rings. The animals were introduced as Bei Bei, Jing Jing, Huan Huan, Ying Ying and Ni Ni—which, put together, translates to "Beijing welcomes you!" A plethora of real and mythic creatures were among the candidates considered by Chinese leaders, Olympic officials and design specialists over the past year. Among those that didn’t make the cut were the dragon and a magical monkey out of Chinese folklore. The choice, the subject of lively media speculation for months, has been a secret since it was finalized three month

[填空题]In the past thirty years Iran has been doing secretly the nuclear enrichment work, which is a direct challenge to the United States, Europe and the rest of the world.

[简答题]The manager ________ (发脾气了) just because his secretary was ten minutes late.

[填空题]设a，b，c≠0，若a=b×c，b=c×a，c=a×b，则|a|+|b|+|c|=______．

[单项选择]模式R（A，B，C，（A，C）→B，（A，B）→C，B→C）属于最高范式的是（）。
A. 1NF
B. 2NF
C. 3NF
D. 4NF

[填空题]有如下程序； a=1: b=2: c=3 a=a+b：b=b+c：c=b+a If a＜＞3 Or b＜＞3 Then a=b-a：b=C-a：C=b+a End If Print a+b+c 运行后，输出的结果是 【15】 。

[填空题]有如下程序；
a=1: b=2: c=3
a=a+b：b=b+c：c=b+a
If a＜＞3 Or b＜＞3 Then
a=b-a：b=C-a：C=b+a
End If
Print a+b+c
运行后，输出的结果是 【15】 。

[单项选择]a，b，c实数满足a：b：c=1：2：5，且a+b+c=24，则a ² +b ² +c ² =( )．
A. 30
B. 90
C. 120
D. 240
E. 270

[单项选择]已知向量a、b、c都是单位向量，且满足a+b+c=0，则a·b+b．c+c·a=（）。
A. -1/2
B. -3/4
C. -3/2
D. 3/2