问题 单项选择题

UNIX是最普遍使用的操作系统之一,下列说法正确的是( )。

A.UNIX系统的用户进程数目在逻辑上不受任何限制,有较高运行效率

B.UNIX系统大部分采用C语言编写,易读易修改,但速度不如汇编系统,所以现在主流操作系统都采用汇编语言书写

C.提供了精心挑选的系统调用,系统地实现紧凑,简洁而优美

D.提供了多种通信机制如管道通信,软中断通信,消息共事存储器通信等

答案

参考答案:B

解析:虽然汇编语言编写的程序速度快,但是不易读不易修改难移植,所以大多数操作系统采用C语言书写。

单项选择题 A1型题
阅读理解

To Chinese immigrants, in the mid-1800s, California was “The Land of the Golden Mountain.” In their homeland they had heard the words, “There’s gold in California.” They sailed 7,000miles to join the gold rush and strike it rich. Between 1849 and 1882, more than 30,000 Chinese came to California. Most were men. They had been farmers in China. They came here to be miners and laborers. They ended up doing many other jobs, too.

Like many other immigrants, they did not plan to stay in America. They came because of their ties to their homeland and their families. They planned to return to China with their fortunes and help their families.

Only a few Chinese gold miners struck it rich. Most picked over the areas that had been mined already. But still, white miners resented the Chinese. Slowly, they drove the “yellow peril” from the mining camps.

By the end of the 1850s, many Chinese returned home. Those who stayed found other jobs.

Few women had come west in the gold rush. The Chinese saw a good business opportunity. They began doing the jobs women would have done. Many became house servants. Many more opened  laundries.

The Chinese opened restaurants. Chop suey and show mein are popular Chinese-American dishes. The Chinese probably created these dishes to serve to the white miners.

Other Chinese became fishermen, farmers, and even cigar makers.

1. Why did Chinese go to America in the mid-1800s?

A. Because they could find good jobs there.   B. Because they had found gold there.

C. Because they could open laundries and restaurants there.

2. The underlined word “resented” mean “________”.  

A. liked                        B. helped               C. hated                    D. served

3. Which should be the title of the passage?

A. Early Chinese immigrants in America     B. Dream to strike it rich

C. The difference between men and women   D. Gold miners in America