下列工程材料属于无机物的是( )。A．木材 B．塑料 C．油漆 D．水泥

“Who needs a shopping mall (购物中心)if you have Taobao?” says Wang Lin, 28, a writer in Beijing.

Taobao, China’s largest online shopping site (网上风物网站)，has become an important part of Wang Lin’s life. She spends lots of money on Taobao.

A growing number of Chinese Internet users like Wang have found the joys of online shopping. Most online shoppers are students or young workers. More women shop on line than men. Clothing and home-use products (产品) are the most popular on line.

It was reported that more than 250 billion (十亿) yuan was spent on online shopping last year, 80% through Taobao.

Taobao means “looking for treasure” in Chinese. People can find almost everything they need on Taobao, from clothes to books, from candies to DVD players.

You may question the security of online shopping, Wang Lin said, “It’s very safe and convenient (便利的). Unless you receive the products from the sellers and are satisfied with them, the shop owner will not get the money. You can also get your money back if you want to return the products.”

根据短文内容，判断句子正（T）误（F）。（共5小题，每小题1分，满分5分）

小题1:Taobao is China’s largest shopping mall.(   )

小题2:The number of Chinese Internet users is growing.(   )

小题3:Taobao is another way of saying “looking for pleasure.”(   )

小题4:The underlined word “security” means “safe”.(   )

小题5:From the passage we know, we can’t return the products if we don’t   like.(   )

a和b是非0的自然数，如果a=3b，a与b的最小公倍数是a。[ ]

搭设钢管井架用的回转扣件是用于（）。

A．连接扣紧西根呈任意角度相交的杆件

B．连接扣紧两根垂直相交的杆件

C．连接两根杆件的对接接长

D．连接扣紧两根水平相交的杆件

对胁痛诊断为肝胆湿热证，最有意义的是

A．潮热盗汗，脉象细数
B．身目鲜黄，舌苔黄腻
C．急躁易怒，头目胀痛
D．情志抑郁，常善太息

数据库中有学生表Student(Sno，Sname，Ssex，Sage，Sdept)，各属性分别表示为学号，姓名，性别，年龄，所在系；学生选课表SC(Sno，Cno，Grade)，各属性分别表示为学号，课程号以及成绩；课程表Course(Cno，Cname，Cpno，Ccredit)，各属性为课程号，课程名，先行课，学分。(先行课的意思是，比如课程号1有先行课5，说明要选课程1，必须先选课程5)。用以上各表完成查询选修了全部课程的学生的姓名的语句补充
SELECT Sname
FROM Student
WHERE NOT EXISTS
(SELECT*
FROM (2)
WHERE (3)
(SKIJECT*
FROM (4)
WHERE (5) AND (6)
))