题目

下列叙述错误的是( ) A．13C和14C属于同一种元素，它们互为同位素 B．6Li和7Li的电子数相等，中子数也相等 C．14C和14N的质量数相等，中子数不相等 D．1  mol  的中子数比1 mol 的中子数少3NA个 答案：B 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(痛), or hurt(伤), will not go away. This happened to a man named Walter. He was in hospital, but he was not getting well. Then he found a new “doctor” inside himself. This “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. And he told his story in a book. He said laughing was his best “medicine”. His doctor thought so, too.Another man called James was ill, and he had a terrible pain in his back. The doctor 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(想象) 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 call on the “doctor” inside your own head. Stay happy and well.阅读短文并回答下列问题。1.Does the medicine that doctors give us always work?____________________________________________________________2.What was Walter’s best “medicine”?____________________________________________________________3.What was wrong with James?____________________________________________________________4.What did James “draw” in this head which made him feel well again?__________________________________________________________5.According to the passage, what can we do to get well again if we still can’t feel better after taking the medicine?____________________________________________________________