问题 选择题

有A、B、C、D四种金属,将A与B用导线联结起来,浸入电解质溶液中,B不易腐蚀。将A、D分别投入等物质的量浓度盐酸中,D比A反应剧烈。将铜浸入B的盐溶液里,无明显变化,如果把铜浸入C的盐溶液里,有金属C析出。据此判断它们的活动性由强到弱的顺序是(    )

A.A>B>C>D         B.D>A>B>C       C.C>A>B>D        D.B>C>A>D

答案

答案:B

题目分析:将A与B用导线联结起来,浸入电解质溶液中,B不易腐蚀,说明A是原电池的负极,B是正极,则A比B活泼;将A、D分别投入等物质的量浓度盐酸中,D比A反应剧烈,说明D比A活泼;将铜浸入B的盐溶液里,无明显变化,如果把铜浸入C的盐溶液里,有金属C析出,说明B比C活泼,故选B。

点评:利用金属的置换、原电池的正负极、置换氢气的难易程度可以比较金属性的强弱,属于简单题。

阅读理解

The story happened during the Second World War. An old man lived in a small town of Germany. He had three sons and they all worked in the same factory where he had worked. After the war had begun, his sons were all made to join the army one after another and they all died in the fights. The old man was very sad. He didn’t have enough food and was often hungry. And nobody helped him and he didn’t know how to go on living.

It was a very cold winter night. The old man couldn’t go to sleep. He had been hungry for two days and it was so cold in his room that ice could be seen. He had to get up and began to run in the room until he lay down on the floor. The next morning he had to beg from door to door. He had been to a lot of cities and knew a lot.

Once he came to a village, but the villagers were all poor and couldn’t give him anything. He was too hungry to go to another village. He thought hard and found a way. He came to a police station and called out, “Hitler is a foolish pig!”

Out came an old policeman at once. He took the old man into a room, gave him some bread and a cup of tea. Then he said, “Don’t say so in our village, sir!”

“I’m sorry, sir,” said the old man. “I don’t know it’s Hitler’s hometown.” “No, no, sir,” the policeman said in a hurry. “It’s pigs’ hometown!”

小题1:The old man’s sons joined the army because_________.

A.they were all strong

B.they loved their country

C.they wanted to be full

D.they had to do so小题2:The old man was sad because _________.

A.his three sons had to join the army

B.his three sons lost their lives during the war

C.he lived in the small town alone

D.he had neither food nor clothes小题3:From the passage we can infer that _________.

A.the old policeman would send the old man into prison

B.the old policeman hated Hitler, too

C.the old policeman thought Hitler was better than pigs

D.the old man found a friend at the police station小题4:In the old policeman’s opinion, _________.

A.Hitler was more foolish than pigs

B.the old man insulted(侮辱)their hometown

C.the old man had to say sorry to him

D.the old man had to fight with Hitler小题5:What would probably be the best title for this passage?

A.An Old Man and His Three Sons

B.Hitler is a Foolish Pig

C.It’s Hitler’s Hometown

D.It’s Pigs’ Hometown

单项选择题