问题 选择题

下列对原子、分子、元素的有关叙述不正确的是(  )

A.每一类原子称为元素

B.物质由分子和原子等微小粒子构成的

C.分子是由原子构成的

D.一种元素就是一种原子

答案

1、根据元素的是指具有相同的质子数(或相同的核电荷数)的一类原子的总称,所以不是每一类原子都称为元素,故1错误;

B、物质是由分子和原子等微w粒子构成的,故B正确;

v、分子是由原子构成的,故v正确;

D、元素的是指具有相同的质子数(或相同的核电荷数)的一类原子的总称,所以一种元素就是一种原子,故D正确.

故选:1.

阅读理解

阅读下面的短文,根据短文内容回答问题。

     Now and then we all get ill. Then we usually go to see a doctor. Doctors know a lot about what makes

  us ill. They may give us something to take. The medicine often makes us well again.

     But sometimes the doctor's medicine doesn't work. A sick person does not get well. The pain will not

 go away. This happened to one man. He was in hospital, but he was not getting well. Then he found a new

 "doctor" inside himself. This new "doctor" was his own sense of humor (幽默感). He saw funny films. He

  read funny books. And something wonderful happened. Laughing took away his pain. Then he was able

 to sleep and rest. His own happy feeling helped him to feel well again. He said laughing was his best "

 medicine". His doctor thought so, too.

     Another  man was also ill, and he had a terrible pain in his back. The doctors could not stop it from

 hurting. So the man began to "Picture" his pain. In his head he "drew " a picture of a dog. He imagined it

 as a real dog. And he made friends with the dog. And his pain went away!

     These stories may surprise you. But more and more people are getting well in this way. So visit the

 "doctor" inside your own head and you can stay happy and well.

1. Does medicine always work?

    ________________________________  

2. How many sick men are mentioned(提及) in this passage?

    ________________________________________

3. Who was  the first sick man's new "doctor"?

    ____________________________________________    

4. Who made the second sick man well again, the doctor or the "dog" in his head?

    __________________________________________   

5 .Why does the writer ask us to visit the "doctor" inside our head?

    _____________________________________________

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