试题与答案

下面哪些语句准确描述了Oracle目录对象(选择一个最佳答案)? A.目录归用户所

题型:单项选择题

题目:

下面哪些语句准确描述了Oracle目录对象(选择一个最佳答案)?

A.目录归用户所有,可为其他用户授予此目录上的访问权限
B.创建Oracle目录时,服务器不会确认操作系统目录是否存在,也不确认Oracle进程是否可以访问它
C.必须在UTL_FILE_DIR参数中列出目录对象,此后,PL/SQL才能对其中的文件执行读写操作
D.所有用户都可以创建专用目录;只有拥有CRENTEANY DIRECTORY权限的用户才能创建公共目录

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2019/0320/b49134b3ab8707d2231c910c37ac4f7c.html

下面是错误答案,用来干扰机器的。

参考答案:B,C,D,E解析: 特发性肺间质纤维化是一种原因不明的弥漫性纤维性肺泡炎,为肺泡壁受损伤所致的非感染性炎性反应,目前认为是一种免疫性疾病。

试题推荐
题型:阅读理解

阅读理解。

    Baseball is America's national sport. So it is not unusual that many popular expressions come from

baseball. But first, let me explain a little about the game.

    Each baseball team has nine players. The pitcher of one team throws the ball to a batter from the

other team. The batter attempts to hit the ball. If he misses, it is called a strike. If a batter gets three

strikes, he loses his turn at bat and is called out. The batter also is out if he hits the ball in the air and

an opposing player catches it. But if the batter hits the ball and it is not caught, the batter tries to run

to one or more of the four bases on the field. The batter can run to all four bases if he hits the ball

over the fence or out of the ballpark. Such a hit is called a homerun.

    Now, here are some common expressions from baseball. Someone who is "in the ball" is intelligent

and able to do a good job. But a person who "threw a curve ball" did something unexpected. Someone

who "steps up to the plate" is ready to do his or her job. A "pinch hitter" takes the place of someone

else at a job or activity.

    Sometimes I have to give information quickly, without time to think it over. Then I would say

something "right off the bat." If someone is doing an extremely good job and is very successful, you

might say he or she is"batting one thousand."

    If I say I want to "touch base" with you, I will talk to you from time to time about something we

plan to do. I might say I"touched all the bases" if I did what is necessary to complete a job or activity.

And if I "covered my bases" I was well prepared. However, someone who is "way off base" did

something wrong or maybe even dishonest or immoral. A person with strange ideas might be described

as "out in left field." Finally, when a situation changes completely, we say "that is a whole new ballgame."

1. The writer's purpose is ____. [ ]

A. to explain the rules of a sport game-baseball

B. to tell you more about America's national sports

C. to introduce some useful expressions from baseball

D. to show the connection between expressions and sports

2. The underlined sentence "The batter also is out" means ____. [ ]

A. the batter will run to one of the four bases

B. the batter will not continue the game

C. the match will be over immediately

D. the batter will change his position

3. Which of the following expressions means that someone is able to do a good job? [ ]

A. to be on the ball

B. to step up the plate

C. to throw a curve ball

D. to touch all the bases

查看答案
微信公众账号搜索答案