问题 单项选择题

主板是PC机的核心部件,在自己组装PC机时可以单独选购。下面关于目前PC机主板的叙述中,正确的是______。
Ⅰ) 主板上通常包含微处理器插座(或插槽)和芯片组
Ⅱ) 主板上通常包含存储器(内存条)插座和ROM BIOS
Ⅲ) 主板上通常包含PCI和AGP插槽
Ⅳ) 主板上通常包含IDE插座及与之相连的光驱

A.Ⅰ+Ⅱ+Ⅲ

B.Ⅰ+Ⅲ

C.Ⅰ+Ⅳ

D.Ⅱ+Ⅲ+Ⅳ

答案

参考答案:A

解析: 主板主要组成部分有:CPU插座、内存条插槽、ROM BIOS、CMOS芯片、芯片组、外设接口、键盘控制芯片、I/O扩展槽、电源插座。PCI和AGP插槽属于I/O扩展槽。所以Ⅳ是错误的。

阅读理解

阅读理解。

     F1 is a very fast car race. It is one of the most popular sports in the world. The drivers go at over

300 kilometers an hour every race. But F1 cars didn't always go so fast.

     In 1895, the first F1 race began in France. During that race, it took the drivers 48 hours to finish

580 kilometers. In 1901, the best drivers had an average (平均) speed of 100 kilometers an hour.

Modern grand prix (奖品) F1 racing began in 1950 in Britain. Grand prix is French. It means "large

prize". Today, 12 teams and 24 drivers race to get points. There are races at different tracks (路线) all

over the world from March to October every year. There are also F2 and F3 racing. But the cars are

slower and less high-tech.

    During a F1 race, drivers have to make several stops to change tyres(轮胎) and put more petrol in

their cars. A team of people do these tasks together to make the stops short. Some people lift the car

up, others change the tyres. While this team works on the tyres, another person puts petrol in the car

and a different person cleans the driver's helmet. One more person talks to the driver about how to win.

It's amazing that all those people finish it in just a few seconds!

     During 100-meter races, people count the athletes' speed by 1/100th (0. 01) of a second, for example

10.81 seconds. In the world of car racing, however, the race has to be timed to 1/1,000th(0. 001) of a

second. That is 50 times faster than the time for a blink (眨眼).

     F1 cars look very colorful. First, cars of different teams have different colors. Then there are a lot

of advertisements on the cars.

1. The best drivers in F1 races can reach the speed of ____ an hour.

A. 100 kilometers

B. 300 kilometers

C. 580 kilometers

D. 1,000 kilometers

2. Modern grand prix F1 racing first began ____. 

A. in France

B. in Britain

C. in 1895

D. in 1901

3. Today F1 race is held ____. 

A. at different tracks all the year round

B. every month all over the world

C. from March to October every year

D. in France and Britain every year

4. When the driver makes stops in a race, a team of people will ____.  

A. help him make the stops short

B. lift the car up and change the tyres

C. put petrol in the car and clean the car

D. clean the driver's helmet

5. In the world of car racing, the race has to be timed to ____. 

A. second 

B. 10. 81 second

C. 1/100th of a second

D. 1/1,000th of a second

单项选择题