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Task 2The Swedes are among the most charming peoples in Europe. And their charm comes from an apparent contradiction in the national character, They are extremely conservative in social relationships; within the family and when meeting friends and business acquaintances, their conduct is governed by strict social patterns. At the same time, they are one of the most intellectually progressive people in the world. They are always open to new ideas.All social occasions in Sweden are regulated by rules and traditions. And these traditions are expressed in a specific ritual made up of formal bows, handshakes, and greetings. When a visitor enters a Swedish home, he is invariably received with a "Welcome"; when he leaves, his host will tell him "You will be welcome again." These charming phrases are an indestructible part of Swedish social life and they give it an old - world flavor of good manners, The Swedes are charming peoples because（）.

A. they are conservative in social relationships
B. they are intellectually progressive
C. their conduct is governed by strict social patterns
D. they are both conservative and progressive in character

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All over the world (1) suggests a picture of the public schools, and it suggests (2) the name like Eton. Actually Eton is a public school. And the best known of the public schools are (3) ,but independent and (4) taking boys from the age of (5) . (6) form is a very small part of (7) secondary, education; only about (8) English boys goes to a public school, and one out of 1,500 goes to Eton. However it is still true that if an English parents have enough money to (9) to send their children to an independent school they (10) . 6（）

Section ADirections: In this section, you will hear 10 short conversations. At the end of each conversation, a question will be asked about what was said. The conversation and the question will be spoken only once. After the question there will be a pause of about 15 seconds. During the pause, you must read the 4 suggested answers marked A), B), C) and D), and decide which is the best answer. Then mark the corresponding letter on the Answer Sheet with a single line through the center. When did the man graduate（）

A. In 1983.
B. In 1984.
C. In 1985.
D. In 1986.

因重大误解订立的合同无效。 ( )

A. 对
B. 错

已知某教务管理系统有下列关系模式(带下划线的属性是主码)：系(系号，系名) 学生(学号，姓名，性别，入学日期，正常毕业日期，所在系号) 课程(课程号，课程名，学分，开课系号，教师号) 选课(学号，课程号，成绩) 教师(教师号，姓名，职称，所在系号) ①请根据给出的关系模式画出该系统的E-R图，图中忽略实体集的属性，但如果实体集之间的联系有属性则需要给出联系属性。 ②随着教学改革的需要，该系统需要满足下列需求：一门课程可由多名教师讲授，一名教师可以讲授多门课程。请根据以上需求修改关系模式，仅列出有改动的关系模式，并使每个关系模式满足3NF。