《河南省郑州市2014高考英语考前冲刺 阅读理解考前自练题12》由会员分享，可在线阅读，更多相关《河南省郑州市2014高考英语考前冲刺 阅读理解考前自练题12（11页珍藏版）》请在金锄头文库上搜索。
1、郑州市 2014高考英语阅读理解考前自练题阅读理解Plants cant communicate by moving or making sounds, as most animals do. Instead, plants produce volatile compounds, chemicals that easily change from a liquid to a gas. A flowers sweet smell, for example, comes from volatile compounds that the plant produces to attract insec
2、ts such as bugs and bees. Plants can also detect volatile compounds produced by other plants. A tree under attack by hungry insects, for instance, may give off volatile compounds that let other trees know about the attack. In response, the other trees may send off chemicals to keep the bugs awayor e
3、ven chemicals that attract the bugs natural enemies. Now scientists have created a quick way to understand what plants are saying:a chemical sensor(传感器) called an electronic nose. The“e-nose” can tell compounds that crop plants make when theyre attacked. Scientists say the e-nose could help quickly
4、detect whether plants are being eaten by insects. But today the only way to detect such insects is to visually inspect individual plants. This is a challenging task for managers of greenhouses, enclosed gardens that can house thousands of plants. The research team worked with an e-nose that recogniz
5、es volatile compounds. Inside the device, 13 sensors chemically react with volatile compounds. Based on these interactions, the e-nose gives off electronic signals that the scientists analyze using computer software. To test the nose, the team presented it with healthy leaves from cucumber, pepper a
6、nd tomato plants, all common greenhouse crops. Then the scientists collected samples of air around damaged leaves from each type of crop. These plants had been damaged by insects, or by scientists who made holes in the leaves with a hole punch(打孔器). The e-nose, it turns out, could identify healthy c
7、ucumber, peper and tomato plants based on the volatile compounds they produce. It could also identify tomato leaves that had been damaged. But even more impressive, the device could tell which type of damageby insects or with a hole punchhad been done to the tomato leaves. With some fine-tuning, a d
8、evice like the e-nose could one day be used in greenhouses to quickly spot harmful bugs, the researchers say. A device like this could also be used to identify fruits that are perfectly ripe and ready to pick and eat, says Natalia Dudareva, a biochemist at Purdue University in West Lafayette, Ind. w
9、ho studies smells of flowers and plants. Hopefully, scientists believe, the device could bring large benefits to greenhouse managers in the near future. 1. We learn from the text that plants communicate with each other by. A. making some soundsB. waving their leavesC. producing some chemicalsD. send
10、ing out electronic signals2. What did the scientists do to find out if the e-nose worked? A. They presented it with all common crops.B. They fixed 13 sensors inside the device.C. They collected different damaged leaves.D. They made tests on damaged and healthy leaves.3. According to the writer, the
11、most amazing thing about the e-nose is that it can. A. pick out ripe fruitsB. spot the insects quicklyC. distinguish different damages to the leavesD. recognize unhealthy tomato leaves4. We can infer from the last paragraph that the e-nose. A. is unable to tell the smell of flowersB. is not yet used
12、 in greenhousesC. is designed by scientists at PurdueD. is helpful in killing harmful insects【参考答案】25.1-4 CDCB阅读理解-文学赏析类(2013江西，D)Mark Twain has been called the inventor of the American novel.And he surely deserves additional praise：the man who popularized the clever literary attack on racism.I say
13、clever because antislavery fiction had been the important part of the literature in the years before the Civil War.H.B.Stowes Uncle Toms Cabin is only the most famous example.These early stories dealt directly with slavery.With minor exceptions，Twain planted his attacks on slavery and prejudice into
14、 tales that were on the surface about something else entirely.He drew his readers into the argument by drawing them into the story.Again and again，in the postwar years，Twain seemed forced to deal with the challenge of race.Consider the most controversial，at least today，of Twains novels， Adventures o
15、f Huckleberry Finn.Only a few books have been kicked off the shelves as often as Huckleberry Finn，Twains most widely read tale.Once upon a time， people hated the book because it struck them as rude.Twain himself wrote that those who banned the book considered the novel “trash and suitable only for t
16、he slums(贫民窟) ”More recently the book has been attacked because of the character Jim，the escaped slave，and many occurences of the word nigger.(The term Nigger Jim，for which the novel is often severely criticized，never appears in it.)But the attacks were and are sillyand miss the point.The novel is strongly antislavery.Jims search through the slave states for the family from whom he has been forcibly parted is heroic.As JChadwick h
