问题 单项选择题

示波器水平通道中,能保证每一次扫描都从同样的电平开始,使屏幕显示出稳定的波形的电路是()

A、释抑电路

B、电压比较器

C、扫描发生器

D、时基闸门

答案

参考答案:A

阅读理解

With more and more farmers working in big cities, their children go into the cities, too.However, problems appear. One of these problems is that is difficult for these children to receive education in cities.

Luckily, there are some free schools for them, but they are not enough. Ten-year-old Li Xin is one of the lucky girls who get a chance to study in one of these schools. She is very happy. She studies in a school specially for migrant workers’(外来务工人员的)children. For children like Li Xin who don’t have enough money, these free schools are their best choice, because they have free classes, textbooks, uniforms and meals in the schools.

But there is a long way to go. The free schools for children from migrant workers’ families are not enough because to run such a school is not easy and needs lots of money. A school officer said they needed at least one million yuan to run the school. “Luckily, some people and companies donate(捐赠)money, used books and a lot of other things to help us. There are also some volunteers teachers,” he added.

Anyhow, we must try to give these children an equal(平等)chance to get better education so that we can make our society harmonious(和谐的).

小题1:From the passage, we know that Li Xin’s parents used to be __________.

A.workers

B.teachers

C.officers

D.farmers小题2:The school provides Li Xin with the following things free except_____.

A.textbooks

B.uniforms

C.computers

D.meals小题3:What does the underlined word “run” mean in Chinese in the passage?

A.奔跑

B.经营

C.考虑

D.收购小题4:The passage mainly talks about__________.

A.what jobs migrant workers can do in big cities

B.the development of big cities

C.helping migrant workers’ children go to school

D.what difficulties those free schools face now

单项选择题