问题 问答题 简答题

什么是电流表?测量电流时电流表与被测电路应如何连接?

答案

参考答案:

①测量电流用的仪表,称为电流表。②用电流表测量电流时,电流表必须与被测电路串联。

阅读理解

阅读理解。

     Mr. White works in an office. He liked reading in bed when he was at school. It was bad for his eyes

and now he is near-sighted. But he wouldn't want anybody else to know about it and he never wears a pair

of glasses. It often brings him some trouble.

     One winter morning he was sent to a village school on business. He got off a bus at a stop in a small town.

Then he had to walk there. The road to the village wasn't smooth. There were stones here and there. He fell

over several times and it made his clothes very dirty. At last he got to the village. Suddenly it began to blow

strongly and it got much colder. His hat was blown off while he was looking for the school. He had to run

after it but he couldn't catch it. He was wondering why his hat ran into a house as if it had legs. And then he

ran into the house, too. A big woman appeared and stopped him by shouting angrily," What are you running

after my hen for?"

1. According to the passage, which of the following is true?

A. Mr. White wears a pair of glasses.

B. Mr. White works in a village school.

C. Mr. White likes reading in bed in his office.

D. Mr. White often has some trouble because of his near sight.

2. What was the weather like when Mr. White was walking to the village school?

A. It was warm.

B. It was windy.

C. It was fine.

D. It was cool.

3. Mr. White couldn't get his hat because _________.

A. his hat had legs

B. his hat was the big woman's

C. he couldn't see his hat at all

D. he couldn't run as fast as his hat

填空题

When you stop and think about your high school or college alma mater, were your experiences more positive or negative Do your feelings of (1) in that school have anything to do with whether or not your school was single-sex or coed (2) to send their children to single-sex schools, because they feel both (3) when they study in the company of students of the same sex. They (4) .
For years, only parents who could afford to send their children to private schools, or who had (5) , chose single-sex education for their children. Single-sex schooling was (6) for most American families. Today, however, along with (7) , public schools are experimenting with the idea of (8) .
Girls may be the ones who benefit most from single-sex schooling. Studies have shown that (9) in coed classrooms because teachers sometimes pay more attention to boys. Girls’ (10) toward their studies tends to disappear as they begin to feel less successful. They start to (11) outperform them in math and science. As boys (12) , girls start to lose it. Moreover, adolescence is (13) for girls. As they experience adolescent changes, some girls become depressed, develop an addiction, or suffer from (14) .
In the early 1990s, some influential people said that being in single-sex classes could (15) . Schools across the country began creating single-sex classrooms and schools. But many critics claim that (16) may actually be detrimental to a girl’s education because they (17) of sex differences.
The renewed interest in single-sex schooling (18) among Americans. Those who give it full endorsement believe girls need an all-female environment to take risks and find their own voices. Those who (19) of single-sex schooling wonder whether students’ lack of achievement warrants returning to an educational system that divides the sexes. They believe there is no (20) .