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1、专题限时检测(二十一)阅读理解之自然类 (共3篇，限时23分钟)A(2014武昌区高考适应性测试)Brown cows may not actually make chocolate milk, but pink silkworms (蚕) do produce pink silk, a team of scientists has discovered. To see if they could produce predyed silksilk that comes colored, straight from the source the team fed ordinary silkwor
2、ms mulberry (桑树) leaves that had been sprayed (喷洒) with fabric (织物) dyes (染色剂). Out of seven tested dyes, only one worked, producing a thread that reminded me of pinkdyed hair.And yes, the worms themselves take on some color before they produce silk. Their colorful diets did not affect their growth,
3、 the team, which included engineers and biologists from the CSIR National Chemical Laboratory in India, reports in the journal ACS Sustainable Chemistry & Engineering. (The researchers didnt look too deeply into how the dyes affected the silkworms health. After all, silkworms die when people harvest
4、 their silk.) The team made dyeing silk this way because coloring fabric normally uses large amounts of fresh water. The water gets polluted with dangerous chemicals in the process, requiring costly treatment before factories can send it back into waterways. Dyeing silk directly by feeding silkworms
5、 would avoid those waterwashing steps. Scientists are just starting to study this idea. However, it remains to be seen if its commercially successful. In this experiment, the Indian team tested seven dyes, which are cheap and popular in the industry.The scientists found different dyes moved through
6、silkworms bodies differently. Some never made it into the worms silk at all. Others colored the worms and their silk, but the color disappears before the silk is turned into fabric. Only one dye, named “direct acid fast red”， showed up in the final, washed silk threads. By the time it made it there,
7、 it was a pleasant, light pink.1The text is most probably a(n)_Ascience reportBtourist guideCanimal experiment Dfashion advertisement2Silkworms can produce pink silk because_.Athey are born pink Bthey are dyed pinkCthey grow in pink water Dthey are fed dyed food3Where was the experiment carried out?
8、AIn America. BIn India.CIn Israel. DIn China.4How many dyes have been proved successful in the experiment?AOne. BThree.CFive. DSeven.B(2014武汉七校第一次联合考试) Its the beginning of 2014, but as USA Today says，“its never too early to plan your 2014 travels”. With so many hot destinations around the globe, “w
9、here should I go？” can be difficult to answer. According to Lonely Planet, though, Brazil is a fine choice on Oct 29th, the travel guide named that country the top one to visit in 2014.“As if endless coast and mountains splashed (飞溅) with rainforest didnt already add up to an unfair share of heaven,
10、 Brazil will hold two of the greatest sporting events in the world, beginning with the 2014 FIFA World Cup and followed by the 2016 Summer Olympics，”explained Lonely Planet.Brazil is the largest and most populous (人口稠密的) country in South America. It boasts (自豪拥有) the Amazon, the worlds largest jungl
11、e, which is home to a variety of plants and animals. But the great scenery is not the only thing Brazilians take pride in.The colors green and yellow might make most people think of Brazils soccer team even more than its national flag. Soccer is more than a sport in Brazil; its a way of life. In fac
12、t, the World Cup brings Brazilians together. It is interesting to note that the general elections in Brazil are usually held during the same year as the World Cup. Political parties try to take advantage of the patriotic enthusiasm(爱国热情) created by soccer to inspire political energy.Alongside soccer
13、, samba is another symbol of Brazil. The countrys most traditional dance is highlighted every February at the Rio Carnival, which is one of the worlds biggest. “Brazil has left its secondclass nation status，” said former Brazilian president Luiz Inacio Lula da Silva in 2009 after Rio de Janeiro was
14、awarded the 2016 Olympics.Brazils growing economy, fueled by oil and aircraft factories, has made it more than just a nation of samba, soccer and beaches. These days, it might just be the best tourist destination in the world.5Which is TRUE about Brazil? ASoccer and samba are two symbols of the coun
15、try. BIt will hold the FIFA World Cup and the Summer Olympics in 2016. CIt is the largest country with the longest history in South America. DIts Amazon is the worlds largest jungle, Brazilians take pride in only.6. We can tell from the words of Luiz Inacio Lula da Silva that_.Ahis country will be t
16、he first class nation status after the 2016 OlympicsBhis country has been left behind by other secondclass nationsChe is confident that his country has developed very fastDthe 2016 Olympics, not samba or soccer, has made his country the first class7. Which of the following aspects are mentioned about Brazil in the a
