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1、阅读理解专项练习50-5ELook closely at your hands. Are they clean? It doesnt matter how many times you wash your hands, tiny microbes (微生物) still stay on them. But dont worry. Most microbes dont harm you.Now scientists say the microbes on our hands could be used in a surprising way; fighting crime, According
2、to a recent survey microbes as well as fingerprints(指纹) could be used to indentify the criminal. Everyone has his own set of microbes on the hands. That is to say, if you and your best friend were able to see and compare all the microbes on your hands, your hands probably would look different. Some
3、microbes only show up on your hands while others live only on your friends hands.When you work on a computer you leave the microbes from your hands on the keyboard. The scientists can easily tell the owner of the keyboard by looking at the microbes on it. Even if you dont leave your fingerprints beh
4、ind, your microbes may give you away.Noah Fierer, a scientist, says. You can only clean a fingerprint, but you cant sterilize (使无菌) a surface just by wiping(擦) it off, He says that scientists have a lot more work to do before the microbe is used as a useful tool.46. According to the passage,_ could
5、be used to identify the criminal.A. fingerprints B. scientists handsC. microbes D. fingerprints and microbes on peoples hands47. Paragraph 3 tells us that_.A. our hands look similar B. the microbes will make the keyboard dirty.C. we should compare hands often D. we have our own sets of microbes.48.
6、When you work on computer, the microbes_.A. just stay on our hands B. also stay on the keyboardC. will do harm to you D. will disappear49. From Noah Fierer we know that_.A. fingerprints are no longer useful in fighting crimeB. microbes can be found on everyones hands.C. unlike microbe fingerprints c
7、an be cleaned if people wipe them D. the microbe is used as a useful tool50. Whats the best title of the passage? A. Microbes May Tell Who You Are B. Scientists Say Everyone Has MicrobesC. Noah Fiercer Does Research Into Microbes D. Fingerprints Help Catch Criminals主旨大意：文章介绍了手上的细菌也可以用来辨别人。46. D 【解析】
8、细节理解题。根据文章第一段的最后一句“According to a recent survey microbes as well as fingerprints(指纹) could be used to indentify the criminal.”可知正确答案是D。47. D【解析】细节理解题。根据第一段的第三句“This first came out of a restaurant in Singapore, but it is now very popular as the soup du jour in Chinese restaurants. ”可知正确答案是A。48. B【解析】
9、推断理解题。根据第一段的第三句“Everyone has his own set of microbes on the hands.”正确答案是B。49. C【解析】细节理解题。根据“You can only clean a fingerprint, but you cant sterilize (使无菌) a surface just by wiping(擦) it off,”。正确答案是C。50. C【解析】主旨理解题。通读全文可知Noah Fiercer在研究细菌。正确答案是C。CJack Johnson is one of the most popular singer-song wr
10、iters in the world. Jack was born on May 18. 1975 in Hawaii Being the song of a famous surfer. Jack usually has an interest in surfing.Most of his life lessons were learned in the water.At the age of 17, Jack entered the finals of the Pineline Mastersthe worldes most famous surfing competition.Every
11、one thought Jack would become a professional surfer like his father.Unluckily .One month later,he had a deadly accident while surfing and was seriously hurt. Life is like a reaching door.When it closes, it also opens. Jack started to practise playing the guitar and write songs when he was staying in
12、 hospital.At first ,his father thought Jack only did it for fun.but soon he was suiprised at the great progress his song had made. When studying in the university. Jack didnt stop practising his guitar skills.He played the guitar for school partses.He wrote songs and sang for his teachers and friend
13、s.They liked his songs.His first music albam Brushfire Fairytaies came out in 2001.It was a great success.His second album，On and On ，was much like his first.They were filled with sweet，easy-going songs that everybody liked listening to later. Jack had lots of concerts in and out of America.He becam
14、e popular all over the world. Jack had five albums by 2010 and more than 15 million copics of them were sold.His music doesnt fit into any of the popular music styles like pop,rocks R and B or hip-hop.It is more like folk music, played with a guitar and beautiful voice.When listening to his songs,yo
15、u feel like lying on the beach enjoying the warm sunfine. Jack is a talent,though he himself says he is only a surfer who loves music. In his songs we can find his secret of success.Whatever happens in our lives,we have to accept it and do the best we can.33.At the age of 17, Jack_.A. had his first
16、music album B. took part in a surfing compentitionC.had his first concert D.became popular all over the world34. Jack started to write songs_.A. while he was staying in hospital B.when he had concerts out of AmericaC. after his seccond album came outD.after he played the guitar at the school party35.What is the seccet o
