问题 选择题

下列物质中,属于化合物的是(  )

A.水

B.氧气

C.空气

D.红磷

答案

水由两种元素组成的纯净物,属于化合物,故A正确;

B、氧气由一种元素组成,属于纯净物,故B错;

C、空气中含有氧气、氮气、二氧化碳等物质属于混合物,故C错;

D、红磷由磷元素组成,属于单质,故D错.

故选A.

阅读理解

第三部分阅读(共两节,满分40分)

第一节:阅读理解(共15小题,每小题2分,满分30分)阅读下列短文,从每题所给的A、B、C、D项中,选出最佳选项,并在答题卡上将该项涂黑

Immediately I got up and dressed, stuck my violin under my jacket, and went out into the streets to try my luck. I wandered about for an hour, looking for a likely spot, feeling as though I were about to commit a crime. Then I stopped at last under a bridge near the station and decided to have a try.

I felt tense and nervous. One moment I was part of the hurrying crowds, the next I stood apart, my back to the wall, my hat on the pavement before me, the violin under my chin.

The first notes I played were loud and raw, then they settled down and began to run more smoothly. To my surprise I was neither caught nor told to shut up. Indeed, nobody took any notice at all. Then an old man without stopping secretly threw a penny into my hat, as if getting rid of some guilty evidence.

Other pennies followed, slowly but steadily, dropped by shadows who appeared not to see or hear me. It seemed too easy, like a secret trick.

I worked there for several days, gradually getting the truths of the trade by trial and error(反复试验).It was not a good thing, for example, to let the hat fill up with money; nor was it wise to empty it completely. Placing a couple of pennies in the hat to start the thing going soon became a regular rule.

41.When he first began to play the violin, he expected           .

A.to get into trouble                                                               B.to play better than he did

C.people to stop and listen to him             D.to be told to move somewhere else

42.The first man who gave him money           .

A.was too busy to stop                            B.wanted to get rid of him               

C.dropped the money by mistake              D.did not want to attract attention

43.He gradually became confident that day because           .

A.nobody looked at him                          B.he played the violin very well       

C.people continued to give him money      D.he earned a lot of money

44.On the following days, he           .

A.made a lot of mistakes                         B.learned how to do the job better    

C.get better at playing the violin               D.did not make so much money

45.He found that the best way of encouraging people to give him money was to          .

A.play in different streets                        B.leave all the money in the hat        

C.empty the hat at regular times               D.leave a small amount of money in the hat

单项选择题