常温下一摩尔双原子分子理想气体，当温度为T时，其内能应为（）。 A.3/2RT B.

用成本-效益法时采用的指标为（）。

A.C／B

B.C／（B—C.

C.B／（B—C.

D.（B—C.／C

E.B／C

在下面PC机使用的外设接口中，哪一种可用于将键盘、鼠标、数码相机、扫描仪和外接硬盘与PC机相连？

A．PS/2

B．IEEE-1394

C．USB

D．SCSI

[l] Imagine waking up to a world where China is the world's leading superpower, astronauts are busy walking on Mars and a brand new political party is ruling the UK? Well, this could be die reality in 14 years if some of the predictions of 100,000 Britons are correct．

[2]The survey asked the people of the UK how they pictured the world in 2025．

[3] Nearly half believe Prince William will be crowned King of England instead of Prince Charles although one in six think the monarchy （君主制度） will have been abolished．A quarter of those surveyed believe a new party will form the government in 2025 although the same number of people think that Labor will be back in power．

[4]On the world stage 60 per cent think China is set to become the world's leading superpower, while a third of us think Great Britain will be made up of four self- governed countries．

[5] Meanwhile technology will have come on in leaps and bounds．Four percent are optimistic that there will be a permanent human base on Mars while one in ten expect a colony of humans to be living in space．More than half questioned in the MSN study predict people will watch all their favorite shows via TV sets hooked up to the Internet．Two - thirds believe cosmetic surgery（整容手术） will have become

common place and one in six think we will look after our own health using computers rather than     .

[6]But at least we can amuse ourselves with the daily comings and goings of pop singers and reality stars, as more than half thinks that “celebrity（明星）”will be a registered profession.

小题1:What is the main idea of the text?(less than 10 words)

小题2:According to the passage, finish the following sentence, （less than 4 words）

The majority of people questioned in the survey believed that China would play___________in the world in 14 years．

小题3:Fill in the blank in Paragraph 5 with proper words, （less than 6 words）

小题4:What did more than 30 percent of the people surveyed think about the UK? （less than 10 words）

小题5:What does the underlined word in the third paragraph refer to? （less than 8 words）

以下各题使用如下三个数据库表：
学生表：student(学号，姓名，性别，出生日期，院系)
课程表：course(课程号，课程名，学时)
选课成绩表：score(学号，课程号，成绩)
其中出生日期的数据类型为日期型，学时和成绩为数值型，其他均为字符型。

查询“计算机系”学生的学号、姓名、学生所选课程名和成绩，正确的命令是( )。

A．SELECT s.学号，姓名，课程名，成绩
FROM student s，score sc，course c
WHERE s.学号=sc.学号，sc.课程号=c.课程号，院系=’计算机系’

B．SELECT学号，姓名，课程名，成绩
FROM student s，score sc，course c
WHERE s.学号=sc.学号AND sc.课程号=c.课程号AND院系=’计算机系’

C．SELECT s.学号，姓名，课程名，成绩
FROM(student s JOIN score se ON s.学号=sc.学号)
JOIN course c ON sc.课程号=c.课程号
WHERE院系=’计算机系’

D．SELECT学号，姓名，课程名，成绩
FROM(student s JOIN score sc ON s.学号=sc.学号)
JOIN course c ON sc.课程号=c.课程号
WHERE院系=’计算机系’

下列各数中，有效数字位数为四位的是（）。

A、WCaO=25.30％

B、[H+]=0.0235mol／L

C、pH=10.46

D、4200kg