问题 问答题 简答题

试按照如下要求对8259A设定初始化命令字:8086系统中只有一片8259A,中断请求信号使用电平触发方式,全嵌套中断优先级,数据总线无缓冲,采用中断自动结束方式。中断类型码为20H~27H,8259A的端口地址为B0H和B1H。

答案

参考答案:

ICW1=1BH(送B0H端口),ICW2=20H(送B1H端口),ICW4=03H(送B1H端口)

阅读理解

阅读理解。

                                                                        Events

     Long March exhibit

     The Shanghai History Museum is putting on exhibition to remember the Long March (长征) which took

place 75 years ago. More than 220 photos and 40 other things are on show. All the exhibition is explained in

Chinese. The show will end on November 20.

     Time: 10:00 a. m.-4:00 p.m.

     Address: 1286 Hongqiao Road

     Ticket: 8 yuan for Chinese / 15 yuan for foreigners

     Thai elephants

     Eight elephants from Thailand ate an attraction for visitors at Changfeng Park by riding bikes, playing

basketball, dancing and blowing a musical instrument. The elephants give three shows a day at 9:30 a.m.,

3:30 p.m. and 8:00 p.m, and there is an extra show at 1:30 p.m. at weekends. The show will end on November

15.

     Address: 189 Daduhe Road

     Ticket: 30-40 yuan

     Dancing dolphins

     Dolphins jumping from the water to touch a ball, dancing to music, kissing people and doing easy math

problems, and seals and sea lions, also parroting, hove rode a large part of the aquarium in Peace Park, which

interests children greatly.

     Hours: 10:30 a.m., 4:00 p.m., and 7:30 p.m.

     Ticket: 20 yuan for adults and 10 yuan for children

1. Where can one see the Long March exhibition?

A. In Shanghai History Muse.

B. In Changfeng Park.

C. In Peace Park.

D. On 189 Dahude Road.

2. How many shows do Thailand elephants give at weekends?

A. One.

B. Two.

C. Three

D. Four.

3. What may interest children very much in Peace Park?

A. Elephants playing basketball.

B. Dolphins dancing to the music.

C. Seals riding bikes.

D. Sea lions blowing instruments.

4. How much should a child pay to go into Peace Park?

A. Five yuan.

B. Fifteen yuan.

C. Ten yuan.

D. Twenty yuan.

5. Which of the following is true?

A. The Long March exhibition is explained in English.

B. The sea animals can work out difficult math problems.

C. Thai elephants' shows can only be seen in the day.

D. The sea animals perform three times a day.

单项选择题 B1型题