问题 填空题

劈相机的额定电压是指额定运行时单相的()。

答案

参考答案:输入电压

阅读理解

阅读理解。

     What is the most important invention of all time? Is it the written word that helps us to record

  information? Is it the telephone that lets us talk to people from all over the world? Is it the car that lets us

  travel at great speeds to meet others? Umberto Eco,  an Italian writer, thinks it is something quite

 different. He says the most important invention might be bright in front of your eyes.  He is talking about

 a simple pair of glasses.

     Modern eye glasses were invented around 1000 years ago. They were more than just a convenient way

  to lead. Before glasses were invented, writers, scientists or teachers who could not see properly had to

 memorize everything.  After about ten years of poor eyesight, they could not remember well enough and

 could not work.  Glasses meant that people could work in their old age.

    People who wanted to remember some information could write it down and read it. Eye glasses are one

  of the world's greatest inventions and were probably worn by the people who designed the first telephone

  and the first car.         

1. The invention of the written word is important because _____.

    A. we need it to listen

    B. we need it to record information

    C. we just need it to read

2. The author thinks _____  is the greatest invention of all time in his passage.

    A. the telephone

    B. the car

    C. a simple pair of glasses

3. Before glasses were invented, writers, scientists and teachers had to_____  

    A. memorize everything

    B. write down everything

    C. read everything       

4.  What happened after glasses were invented?

    A. People could not remember well enough.

    B. People could not remember weli enough.

    C. People could write down some information and read it.

5. From this passage, we can know_____ .

    A. modern eye glasses were invented 100 years ago

    B. people who designed the first telephone and the first car probably wore those glasses

    C. the author of this article is an American

填空题