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在语句SELECT [ALL|DISTINCT]中，DISTINCT是默认的。（）

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更多“在语句SELECT [ALL|DISTINCT]中，DIST…”相关的问题

第1题

SELECT语句可以嵌套在其他许多语句中，这些嵌套的SELECT称为子查询。（）

此题为判断题(对，错)。

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第2题

在SELECT语句中使用*表示【】A．选择任何属性B．选择全部元组C．选择全部属性D．选择主码

在SELECT语句中使用*表示【】

A．选择任何属性

B．选择全部元组

C．选择全部属性

D．选择主码

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第3题

Parents and teenagers often disagree about the amount of freedom and responsibility that y

oung people are to have. The teenager often wants to be【21】to choose his own friends, select his own courses in school, plan for his own vocational【22】, and earn and spend his own money, and generally【23】his own life in a more independent fashion than .many parents are able to【24】.

Most problems between teenagers and their parents yield best to (导致) joint planning and decision making. Within any particular family【25】are avoided and problems are solved when all of the persons take【26】in the situation,【27】in working it out.【28】parents and young people learn how to get【29】well with each other and develop skills in understanding and【30】understood, even the most difficult problems are relieved.

(36)

A．free

B．likely

C．able

D．curious

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第4题

Ⅲ. Cloze （30 points) Directions: For each blank in the following passage, there are fo

Ⅲ. Cloze (30 points)

Directions: For each blank in the following passage, there are four choices marked A, B, C and D. Choose the one that is most suitable and mark your answer by blackening the corresponding letter on the Answer Sheet.

Times have changed and the ideas of the young and the old about the same thing are often ill contra diction. For example, parents and teenagers often disagree about the amount of freedom and responsibility that young people (21) to have. The teenager is more independent and often wants to be (22) to choose his own friends, select his own courses in school, plan for his own vocational (23) , and earn and spend his own money, and generally (24) his own life in a more independent (25) than many parents are able to (26) .

Most problems (27) teenagers and their parents yield to (导致) (28) planning and decision making. Within ally particular family, (29) are avoided and problems are solved when all of the persons take (30) in the situation, and (31) in working it out. (32) parents and young people learn how to get (33) well with each other and develop skills in understanding and (34) understood, even (35) most difficult problems are relieved and a situation might appear that teenagers and their parents can some times see eye to eye.

21. A. is

B. should

C. will

D. are

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第5题

Internet-addicted job seekers may be partly the cause of the fact that it is taking the un

employed 23% longer to find a new position than it took during the last recession (经济萧条) , when the "benefits" of online job searching were unavailable. "A growing number of unemployed Americans waste time browsing(浏览) the estimated 4,000 to 5 ,000 online job sites, filling them with resumes, and then waiting for replies. It is common for long-time joblessness," argues Professor John A. Challenger. Although the Internet has the potential to be very useful for job seekers and it has become the primary tool for many, Challenger believes that it should be considered secondary to the traditional technique of meeting would be employers in person.

In addition to slowing job search efforts, the Internet is making the hiring process longer for the employer. In a survey of 5,000 hiring managers by an online resume site, 72% said that a majority of the resumes they received in response to an online job posting did not match the position's description.

"The more unrelated resumes managers have to go through in order to select the few to bring in for interviews, the longer it takes to fill the position," points out Challenger. " One result of this has been the increased use of screening software by employers. This will make it even more difficult for job seekers to get their resumes in front of the hiring executive for an interview. "

" All of this is not to say that the Internet has not revolutionized job hunting. It has certainly made it easier for someone in San Francisco, for example. , to search for job openings in Miami. In addition, the ability to conduct keyword searches has reduced the amount of time it takes to find the type of position a person is seeking. "

" Job seekers must learn how to use the Internet as a tool, rather than just relying on it as a means for submitting electronic resumes. " concludes Challenger.

According to the passage, the coming of online job searching brings______.

A．longer waiting time for the unemployed

B．longer computer technology training for the job seekers

C．more unemployment throughout the USA

D．more job opportunities in the Internet world

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第6题

A. aim B. propose C. select D. tend

A.aim

B. propose

C. select

D. tend