问题 选择题

对甲、乙两图所示的实验,下列说法正确的是

A.甲实验可以研究电动机的工作原理

B.乙实验可以研究通电导体在磁场中受力情况

C.甲实验的过程中,电能转化为机械能

D.乙实验的过程中,机械能转化为电能

答案

答案:B

题目分析:A.甲实验没有电源,有一个灵敏电流计,是用来研究电磁感应现象的实验;A错误,不符合题意;B.乙实验有电源,和磁场,是研究电流在磁场中的作用,即通电导体在磁场中受力情况;B正确,符合题意;C.甲实验的过程中,运动AB导体,灵敏电流计有示数,即机械能转化为电能;C错误,不符合题意;

D.乙实验的过程中,也就是电动机原理,是电能转化为机械能,D错误,不符合题意;答案选B

阅读理解

English is a very interesting language. It has borrowed words from many other languages. Immigrants(移民) coming into the United States have contributed many words to the language, which have kept their original pronunciation. “Coolie” and “kowtow” were taken from the Chinese language, “kamikaze from the Japanese, “shampoo” from India, “blitz” from German, “amigo” and “Los Angeles” from Spanish and so on.

Many students have studied English for years, some as many as eight. However, some students still have difficulty in speaking fluent English. Some know many words but are unable to discern them when native speakers use them. In our Oral English classes we will focus on speaking and listening to native English speakers. For this reason, because we are trying to train your ears to hear English and your mouths to speak intelligible (易理解的) English, we will have a rule that ONLY ENGLISH will be spoken in our English classes. Anyone speaking Chinese in class will be required to pay a fine in order to encourage the speaking and understanding of English. If teachers enter a classroom and discover that anyone is speaking Chinese, they will require everyone in the room to pay the fine. It is everyone’s job to enforce the English-Only rule. It is for your benefit. It is because we want to accustom (使习惯于) your ears to hearing English.

Other subjects may be learned solely from books but the only way to learn a foreign language is to SPEAK IT! Students are often nervous about speaking in class at first but we hope to make the classes fun, so you will forget your nervousness and learn to speak out. Enjoy your classes.

小题1:The first paragraph is mainly about________.

A.the difficulty of learning English.

B.how interesting and various English is

C.different words in different languages

D.the immigrants’ contributions to America小题2:The underlined word “discern” in Para 2 can be replaced by___________.

A.understand

B.notice

C.hear

D.speak小题3:In the author’s opinion , the only way to learn a language well is to__________.

A.listen to it on the radio

B.learn it from books

C.play games with it

D.speak it often小题4:The article is probably aimed at________.

A.Japanese students

B.German students

C.Chinese students

D.Indian students

单项选择题 B型题