有三个关系R、S和T如下: R S T 则由关系R和S得到关系T

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问题:

有三个关系R、S和T如下:
R


S


T


则由关系R和S得到关系T的操作是

A) 自然连接 B) 交 C) 除 D) 并

考点:计算机等级考试JAVA二级JAVA笔试
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在我国,社保基金主要由两部分组成:一部分是社会保障基金;另一部分是社会保险基金。( )

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阅读理解。

    Good evening, ladies and gentlemen, I'm Roy, and this is my show. This is a television

show for all families, and I know you'll enjoy it.

    Let's start with a story. Once there was a proud pig on a farm. He thought he was the

most important of all the animals on the farm. But it was not enough that he himself

thought this: he had to be sure that other animals thought it, too. So he went up to a

chicken and asked, "Who is the most important animal on the farm?" The chicken answered,

"You are, Mr. Pig." Then he asked a dog, and he got the same reply.

    Next, he asked a cow. When the cow seemed uncertained of the right answer, the pig look

ed angry, and showed his teeth, "Oh, you are, of course, Mr. Pig." said the cow. "Of

course," the pig said, "there is no doubt about it."

    At last the pig asked a big horse the same question. The horse lifted one foot, rolled

the pig over and placed his foot on the pig's head. "I think you know the answer now."

said the horse.

1. The Roy show is ______. [ ]

A. a family show on TV

B. for kids only

C. a sports show

2. When the pig asked a dog, the dog ______.

[ ]

A. said nothing

B. said the pig was the most important

C. said the pig was as important as the horse

3. The horse thought ______ was the most important on the farm. [ ]

A. he himself

B. the pig

C. the cow

4. The word "uncertained" means ______. [ ]

A. 相同的

B. 犹豫的

C. 令人满意的

5. What's the best title of this passage?[ ]

A. A pig and a cow

B. A farm

C. The most important animal

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伤亡事故报告和处理制度包括( )。

A.企业职工伤亡事故分类

B.伤亡事故报告

C.伤亡事故调查

D.伤亡补偿费用

E.伤亡事故处理

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长沙市第二届全民健身节瑞翔大众滑雪赛将于7月17日盛大开赛,请问本次比赛地点设在哪里?

题型:单项选择题

()是查处违法行为,正确实施行政处罚的前提和基础。

A、情报分析

B、情报利用

C、熟悉案情

D、调查取证

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