From the abstract, what is the method of pervious study？（)

Studies have shown _____ teenagers often suffer from depression .

A.that

B.which

C.in which

D.in that

A: ()is David from？ B:I think he's an American. But I'm not sure.

A. Where

B. What

C. How

A NP–movement/WH-movement

B NP–movement/Aux-movement

C AUX-movement/WH–movement

D WH–movement/AUX-movement

I don't doubt ______ the stock market will recover from the economic crisis.

A) if B) what C) that D) which

The course normally attracts 20 students per year, ______ up to half will be from overseas.

A．in which B．for whom C．with which D．of whom

标准SQL基本查询模块的结构是______。

A．SELECT…FROM…ORDER BY

B．SELECT…WHERE…GROUP BY

C．SELECT…WHERE…HAVING

D．SELECT…FROM…WHERE

标准SQL基本查询模块的结构是________。

A．SELECT…FROM…ORDERBY

B．SELECT…WHERE…GROUPBY

C．SELECT…WHERE…HAVING

D．SELECT…FROM…WHERE

一____________？

一I'm a journalist.

A. What's your name

B. What's your job

C. Where are you from

- Perhaps you don't believe it. I just had a close call. ()

A. What happened？

B. Who called you？

C. Was it from your close friend？

有如下SQL语句:

SELECT SUM(工资) FROM 职工表 WHERE 仓库号 IN;

(SELECT 仓库号 FROM 仓库表 WHERE 所在城市="北京" OR 所在城市="上海")

执行语句后,工资总和是

A．3500.00

B．3000.00

C．5000.00

D．10500.00

33 Sources for data on activity durations and resource requirements can be gathered from which of the following:

A. Past project records (historical data)

B. Commercial techniques (standard practices, rules of thumb)

C. Past project team members knowledge (experience, oldtimers)

D. All of the above

E. A and C only