[单项选择]All trainees in a certain aviator training program must take both a written test and a flight test, If 70 percent of the trainees passed the written test, and 80 percent of the trainees passed the flight test, what percent of the trainees passed both tests ？（）
(1)10 percent of the trainees did not pass either test.
(2)20 percent of the trainees passed only the flight test.
A. 条件(1)充分，但条件(2)不充分．
B. 条件(2)充分，但条件(1)不充分．
C. 条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分．
D. 条件(1)充分，条件(2)也充分．
E. 条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．

[单项选择]In a certain room，all except 18 of the people are over 50 years of age．If 15 of the people in the room are under 50 years of age，how many people are in the room
A. 27 B. 30 C. 33 D. 36E. It cannot be determined from theinformation given．

[填空题]certain

[单项选择]

All friendships require a certain amount of chemistry. But when two people of the opposite sex become friends, sometimes those friendly feelings can start to resemble something more like sexual tension.
Male-female friendships can be an emotional minefield of hidden desires. Does this mean you secretly want to jump into bed with all of your friends Of course not. But do you ever wonder how many of them might be interested if the opportunity presented itself Maybe you and your platonic (柏拉图式的) friendship are just a bad breakup and a bottle of wine away from crossing that boundary and hooking up(结合).
So can two people of the opposite sex ever really be "just friends" The Hollywood answer to this age-old question is a decisive HELL NO. On screen, male-female friendships always turn into something more. Harry and Sally, Chandler and Monica, Jim and Pam ... do I need to go on Even the characters in Just Friends wind up becoming much more than the film’s
A. really be just friends
B. never be just friends
C. have nothing but romance
D. work together better than the same sex

[单项选择]In a certain population, 40 percent of all people have biological characteristic X; the others do not. If 8,000 people have characteristic X, how many people do not have X ？（）
A. 3200
B. 4800
C. 12，000
D. 16，000
E. 20，000

[单项选择](1)
A. stated
B. instructed
C. illustrated
D. declared

[单项选择]In C program, all variables must be declared before (52) , usually at the (53) of the function before any executable statements.

A. stated
B. instructed
C. illustrated
D. use

[单项选择]

In C program, all variables must be  （）  before use, usually at the beginning of the function before any  （）  statements.

In C program, all variables must be （） before use.
A. stated
B. writed
C. illustrated
D. declared

[填空题]The program aims to let all the employees (understand) ______ the culture of the company.

[单项选择]

On television all over the world there are programmes about the work of the police. They are popular because they are usually very exciting. In London there is a television programme called "Police Five "--because it is on for five minutes once a week. A television reporter, Shaw Taylor. talks about crimes in the London area. He asks for public help. The police station needs the help of ordinary people because sometimes you or I have information that can be useful to the police.
Shaw Taylor shows pictures of paintings, jewellery (珠宝) and other things which thieves stole during the week. Sometimes he shows the car that the thieves escaped in. When people see men or things on the television programme which they may remember, they can tell the police where they saw them. With their help the police may catch more criminals.
Sometimes the police find a car or some money. Shaw Taylor shows them on television. The owners sometimes see them. Then they can teleph
A. they try to get the things back
B. they know their things have been stolen
C. they know their things are at the police station
D. they tell the police the whereabouts of the shown things