问题 填空题

如图标出的是有关灯泡组成的物质,请根据右图回答下列问题.

(1)所标物质中属于金属单质的是______(写一种单质化学式),属于混合物的是______(写一种物质名称即可),能与稀盐酸反应的物质是______(写一种物质名称即可).

(2)氮气可用于灯泡填充气,是因为______;钨丝可用于灯泡的灯丝,是因为______.

(3)铜粉中如果混有铝粉可以用______方法除去铝粉.

答案

(1)铜是由一种元素组成的纯净物,属于单质.玻璃中含有多种物质,属于混合物.铝在金属活动性顺序中排在氢的前面,能和稀盐酸反应.故填:Cu;玻璃;铝.

(2)氮气可用于灯泡填充气,是因为化学性质稳定;钨丝可用于灯泡的灯丝,是因为熔点高.故填:化学性质稳定;熔点高.

(3)铝在金属活动性顺序中排在氢的前面,能和稀盐酸反应.铜在金属活动性顺序中排在氢的后面,不能和稀盐酸反应.故填:稀盐酸.

阅读理解

根据短文内容判断正误,正确A,错误B。

     When you are ill, you will see a doctor. The doctor will write a note to take to the chemist for some

medicine. Chemists are usually good at reading doctor's notes. But sometimes doctors write too badly and

even the chemists can't read them.

     One day a woman wrote to a doctor to invite him to have dinner with her family in the restaurant. The

doctor wrote an answer, but he wrote too badly and the woman could not read it. "What shall I do?" she

asked her husband. "I don't know whether he is going to come or not. I don't want to call him and say that

I don't understand him."

     Her husband thought for a few minutes and then he had and idea."Take it to the chemist," he said. "He

will be able to read it for us." The woman went to the chemist's shop and gave the doctor's"note" to him. The

chemist looked at it for a long time.

     "Could you wait a moment, Miss?" he said. Then he went to the back of the shop. After a few minutes he

came back, carrying a large bottle (瓶子). He gave the bottle to the woman.

     "Take one spoonful (一匙) every day," he told the woman.

( )1. The doctor invited the woman to dinner one day.                             

( )2. The woman couldn 't read the note because the doctor wrote it badly.        

( )3. The husband asked his wife to go to the chemist's shop and get some medicine.

( )4. The chemist gave the woman a large bottle of medicine.                      

( )5. In fact, the chemist didn't know the meaning of the doctor's note at all.   

选择题