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1、全国各地接二连三地发生了多起特大安全事故，造成严重的人员伤亡，特别是北京密云、吉林商厦等特大安全事故，引起了党中央和国务院的高度关注题组层级快练2 Unit 2 English around the world “阅读七选五完形”组合练(时间：35分钟).阅读理解阅读下列短文，从每题所给的四个选项(A、B、C和D)中选出最佳选项。China is going green. In order to reduce air pollution and oil shortages, automobile manufacturers have announced their plans to devel
2、op hybrid vehicles(混合燃料汽车)for the Chinese market. Toyotas hybrid car Prius will be ready to drive in China this week. Lets have a look at the new car.Any vehicle is a hybrid when it combines two or more sources of power. Hybrid cars run off a rechargeable battery and gasoline. Hybrid cars have speci
3、al engines, which are smaller than traditional gasoline engines. They run at 99 percent of their power when the car is cruising(匀速行驶). A specially designed battery motor provides extra power for running up hills or when extra acceleration is needed.Step into a Prius, and turn on the engine. The firs
4、t thing you notice is how much quieter it is than a traditional car. At this point, the cars gasoline engine is dormant(休眠). The electric motor will provide power until the car reaches about 24 km/h. If you stay at a low speed, you are effectively driving an electric car, with no gasoline being used
5、, and no waste gas gives off.The onboard(车载的)computer makes the decision about when to use a gas engine, when to go electric, and when to use a combination of the two. If you go over 24 km/h, when you step on the gas pedal(油门), you are actually telling the computer how fast you want to go.The electr
6、onic motor recharges automatically using a set of batteries. When driving at high speed, the gasoline engine not only powers the car, but also charges the batteries. Any time you use the brake, the electric motor in the wheels will work like a generator and produce electricity to recharge the batter
7、ies. As a consequence, the cars batteries will last for around 200，000 miles.1. The author writes this passage mainly to _A. teach people how to drive a hybrid car B. show how to save their gasoline when driving a car C. introduce a new kind of “green” car D. announce plans to develop hybrid vehicle
8、s for China2. The first sentence probably refers to _A. there will be more and more green land in ChinaB. China has started producing environmentally friendly carsC. Chinas new cars are combinations of different green modelsD. China is still young and lacking experience3. What is the most important
9、feature of hybrid cars?A. They have smaller engines than traditional gasoline ones.B. They are much quieter than traditional cars.C. They only use 99 percent of their power to run up hills.D. They are powered by both a rechargeable battery and gasoline.答案13 CBD.阅读填空根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两
10、项为多余选项。 (2017济宁模拟)Every living thing has genes. Genes carry information. _1_ They make sure that humans give birth to humans and cows give birth to cows. They also make sure that a dog doesnt give birth to a frog, or an elephant to a horse. However, genetic engineers take genes from one species for
11、example, a snake, and transfer them to another for example, corn. _2_ Such new life forms have been described, by some scientists as a reallife Frankenstein. Genetic engineers put duck genes into chicken to make the chickens bigger. They put hormones(激素)into cows to make them produce more milk. They
12、 put genes from flowers into beans and from fish into tomatoes. _3_ It just makes them easier and faster for the farmer to grow. The effects of genetic engineering on the natural world may be disastrous. The engineers may create strange life beings, or monsters that we cannot control. _4_ Theyll hav
13、e to find one, fight for one or kill for one. It may be your land they fight for or you that they kill. Moreover, the effects of these experiments can often be cruel. In America, pigs were given human genes to make them bigger and less fatty. The experiment failed. The pigs became very ill and began
14、 to lose their eyesight. We would all like a better, healthier and longer life, and genetic engineering might give us this. On the other hand, it may be a dangerous experiment with nature. In the story of Frankenstein, the doctor created such a terrible and dangerous monster that he had to destroy i
15、t. _5_A. The information tells us what to do or what not to do.B. We must make sure that this tale remains a story and no more than that.C. This doesnt make them cheaper, tastier, or healthier.D. The new life forms have no natural habitat or home.E. Then they feed the tomatoes to the fish.F. In this
16、 way a new life form is created.G. They are passed on from generation to generation.答案与解析【文章大意】本文主要介绍了转基因食品的来源和可能给人类带来的灾难。1. 答案G解析根据题干和G项中的关键词pass on，carry，generation，gene可判断答案。2. 答案F解析根据题干和F项中的关键词new life，form可判断答案。3. 答案C解析根据题干和C项中的关键词cheaper，tastier，or healthier，easier，faster等判断答案。4. 答案D解析根据题干和D项中的关键词natural, pig, home等判断答案。5. 答案B解
