题目内容
若两片8237A(DMA控制器)工作在级联方式且按下图连接，每个8237A优先级均固定不变，则连接到8237A的DMA请求引脚上的通道2、通道3、通道5、通道6的请求信号，其优先级从高到低的顺序是()。
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The professor suggests that the student ______.
Task 1
Directions: After reading the following passage, you will find 5 questions or unfinished statements, numbered 36 through 40. For each question or statement there are 4 choices marked A, B, C, and D. You should make the correct choice.
In England recently three foreigners came to a bus stop. About 5 minutes later the bus they wanted came on. They prepared to board it. Suddenly there was a hind noise behind them. People rushed on to the bus and tried to push them out of the way. Someone shouted insulting remarks about foreigners. The bus conductor came rushing down the stairs to see what all the trouble was. The foreigners didn't know about the British custom of queuing for a bus. The first person who arrived at a bus stop is the first person to get on the bus.
Learning the language of a country isn't enough. If you want to have a pleasant visit, find out as much as possible about the manners and customers of your hosts. You will probably be surprised just how different they can be from your own. A visitor to India would do well to remember that people there consider it impolite to use the left hand for passing food at table. The left hand is supposed to be used for washing yourself.
In Europe it is quite usual to cross your legs when sitting talking to someone. Doing this when meeting an important person in Thailand, however, could cause offense. Attitudes to women vary considerably around the world. In Japan, for example, it is quite usual for men to plan evening entertainments for themselves and leave their wives at home. In Europe such attitudes are disappearing.
The three foreigners were pushed out of the way because______.
The International Student Advisor recommended a book ______.
Section B
Directions: This section is to test your ability to understand short conversations. There are 2 recorded conversations in it. After each conversation, there are some recorded questions. The conversations and the questions will be spoken only once. When you hear a question, you should choose the correct answer from the 4 choices marked A, B, C, and D.
听力原文：W: Hey! The train is late! I've been waiting her for ages.
M: Which train, madam？
W: The 8:18 to Baker Street.
M: The 8:187 I'm afraid you've made a mistake, madam.
W: A mistake？ My timetable says: Baker Street train—8:18.
M: Oh, no, madam. The Baker Street train leaves at 8: 08.
W: At 8:08？
M: You see, madam. They changed the timetable at the end of April.
W: Changed it？ May I see the new timetable？ What does it say？
M: It says: Baker Street train—8:08.
W: Hm! So the train isn't late. I'm late.
(6)
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