从两个或多个实体或面域的交集创建复合实体或面域，并删除交集以外的部分应该选用以下命令（）。

A:干涉命令“interfere” B:交集命令“intersect” C:差集命令“subtract” D:并集命令“union”

下列关键字可以将两个或更多基于不同表的查询结果合并成为一个单独的结果集，可以将这样的结果集创建为一个视图，在用户看来就像一个单独的表一样（）。

A:UNION B:ORDERBY C:LINK D:LIKE

对于一个仪表接头：3/8”直通union，其中3/8”指的是（）。

A:该union长度为3/8” B:该union螺母外径为3/8” C:该union与3/8”的卡套管（仪表管）匹配 D:该union内外径之比为3/8”

Which of the following proposals did the Ordinance of 1784 incorporate

A:New states should be admitted to the Union in numbers equal to the older states. B:The Union should make the western region into tributary states. C:New states should share the same rights in the Union as the original states. D:The great western region should be divided into twelve states.

若有下面的说明和定义：
union un
char s[10];
long d[3];
ua;
struet std
char c[10];double d;int a;
union un vb;
a;
则printf("%d/n", sizeof(struct std)+sizeof(union un))；输出的值为______。

A:34 B:52 C:54 D:64

若有数据类型定义如下： union A{float a1;float a2;}; 则表达式sizeof(union A)的值为___(5)___。

Student Services

Students' Union

Every University has a Students' Union. If students are the lifeblood of a university, the Union is surely its beating heart.

For students, by students

A.Students’ Union is run by students and acts independently. At the end of each academic year, it will find six students to hold a sabbatical（带有休假的） position managing the Union for the coming year. That the six successful sabbatical officers have only recently experienced issues affecting students ensures that your needs are very well understooD.

Letting your hair down

Although the University is spread across a fairly wide area, the Union is centrally located and is only a short walk from any of the main buildings. This makes it very easy to catch up with friends who might be on a different coursE.

At night, the place really comes alive – we have three different bars to suit every occasion. The venues are student-only so you can be sure of meeting people with a similar outlook and we throw in a transport service to make sure you get home safely.

The Union also organizes various formal balls throughout the year, with the highlight being the end-of-year ball.

Supporting you

Beyond having fun, we also make sure some of the more serious issues are effectively dealt with. If you have a problem with your course, another sabbatical officer is trained to help you. Being independent from the University means we can represent and support you to the best of our ability, and once you reach university you may find that you become aware of more national or political issues.

From the second paragraph of the passage, we can infer that ______.

A. a Students’ Union is operated by the university

B. a Students’ Union is not operated by the university

C. a Students’ Union is operated is working for the university

D. a Students’ Union is affected by the university

The person who takes up a certain post of the Students’ Union ______.

A. learns what the students need

B. is very happy and easy

C. can affect the life of any student

D. has understood everything of the University

According to the third paragraph, we can learn that ______.

A. a Students’ Union is far away from the university

B. a Students’ Union is near to the home

C. a Students’ Union is central part of the university

D. a Students’ Union has different courses for all the students

From the passage, we can learn that ______ is the most wonderful program of every year.

A. making friends

B. dancing in a bar

C. the match of the end-year ball

D. electing the officers

After reading the last two parts, we can infer that _______.

A. the Students’ Union can help a student who has trouble in the study

B. the Students’ Union can help a student who is being trained

C. the Students’ Union can cultivate the ability of a student to be suitable for political position

D. the Students’ Union can support a student to run the University

【小题1】B

【小题2】A

【小题3】C

【小题4】C

【小题5】A

略

.

Opened on October, 27, 1907 and completed in 1908, Union Station (联盟火车站) is considered to be one of the finest examples of the Beaux-Arts (古典装饰的) style of architecturE. Architect Daniel Buraham designed the building.

At the time it was built, Union Station covered more ground than any other buildings in the United States and was the largest train station in the worlD. In many ways, Union Station was a city within a city. At various times it employed a staff of over 5,000 people and provided hotel, ice house, first-class restaurant and police station.

As train travel was the means of transportation for even US Presidents in the early 1900s, a Presidential Suite (总统套间) was added to Union Station. In 1909, President Taft was the first President to use the room and over the years many famous people were officially welcomed therE. The last President to use the Presidential Suite was President Eisenhower.

For half a century and through two world wars, Union Station served Washington and the US as a major center of transportation and the place for many historic events. On April 14, 1945, a train backed into Union Station carrying the casket (棺材) of President Franklin Delano Roosevelt.

However, the air travel led to a decline in railroad passengers, and Union Station began to fall into disusE. In 1968, the decision was made to change it into the "National Visitor Center". The project opened in July 4, 1976 but failed to draw enough crowds to sustain（=keep up） its operation, and was closed in 1978.

While Congress debated the future of Union Station, rain damage caused parts of the roof to fall down. Following three years of repair at a cost of $160 million, Union Station reopened on September 29, 1988.

Today, Union Station continues to make history as the most visited place with over 29 million visitors a year. World-class exhibitions and international cultural events are hosted there for the public to enjoy. Private special events are celebrated in the grand halls. Even today, US Presidents still visit Union Station.

68. What is the passage mainly about?

A. Introduction to Union Station. B. Architecture in the US.

C. Train stations in the US. D. Transportation in the US.

69. Place the following events in the correct order.

A. Union Station reopeneD.

B. President Taft used the Presidential SuitE.

C. The decision was made to change Union Station into the "National Visitor Center".

D. The construction of Union Station was completeD.

A. cdba B. dacb C. dbca D. acbd

70. The underlined sentence in Paragraph 6 implies that _______.

A. Union Station was a symbol of the US

B. Union Station was of no use

C. the government was unwilling to waste money on Union Station

D. Union Station was not rebuilt immediately

71. Which of the following statements is NOT true according to the passage?

A. Union Station is still the largest train station in the worlD.

B. Union Station made great contributions to the United States.

C. The repair work of Union Station lasted several years.

D. Union Station is popular in the US nowadays.

68---71   ACDA