题目内容
如果8251A设定为异步通信方式，发送器时钟输入端和接收器时钟输入端都连接到频率为2KHZ的输入信号，波特率因子为16，则波特率为()。
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为了将AL寄存器中的AL0的内容传送到BL寄存器的BL0中，且保持BL7～BL1不变，下面程序段的空白处应填写的指令是()。______ ROR AL，1 RCL BL，1
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()。
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______.
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