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1、Lesson 3Scientific Breakthroughs一、单词拼写1He was faced with the d of whether or not to return to his country.答案dilemma2The children were s into four groups.答案split3The (总理) deals with important affairs of the state.答案premier4The policeman had to w with the case in order to catch the criminal.答案wrestle5
2、Its too early to know the (结果) of her illness.答案outcome二、完成句子1学生的年龄在19岁到22岁之间。The students ages 19 22 years old.答案range from;to2他们拥有两套房子,另外还有一条船。They own two houses, a boat.答案not to mention3他现在仍在同他的前任女友通信。He is still his former girlfriend.答案corresponding with4我正要锁门,这时天开始下雨了。I lock the door it began
3、to rain.答案was about to;when 5她下决心要让儿子改掉坏习惯。She decided to her son his bad habit.答案cure;of三、阅读理解A(导学号59260014)Airtight plastic bags can help farmers protect their harvests without the use of harmful chemicals.These bags are designed to keep air out of crops in storage.Using them is a simple way to fi
4、ght insects and keep crops fresh.Ten countries in West and Central Africa are involved in a project to improve the storage of cowpeas,also known as black-eyed peas.Farmers can lose much of the harvest to insects called bruchids(豆象),which grow from eggs to adults in a few weeks and then lay forty to
5、sixty eggs.They can destroy the whole harvest within months.Farmers can sell their crops immediately.But selling crops at harvest time means more competition and lower prices.Or they can use pesticides(杀虫剂) to kill the bugs.But a crop scientist Dieudonne Baributsa says,“They end up misusing or overu
6、sing the pesticide.In Nigeria,a lot of cases of death have been reported.They usually call cowpeas killer beans in Nigeria.”Mr Baributsa is a researcher at Purdue University in Indiana,America.The project is called PICSPurdue Improved Cowpea Storage.He says the storage bags are thick enough so that
7、any insects already in the cowpeas will die from a lack of oxygen.The lack of air will also help prevent the growth of bacteria that can ruin the harvest.The bags cost about two dollars each.Mr Baributsa says that is not much,especially if it means farmers can wait long enough to get a better price
8、for their crops.The bags are produced locally.Donors currently support the project,but the groups involved are working to build a lasting market for the bags because donation for the project will not last forever.A company based in the United States called GrainPro makes another kind of airtight bag
9、s.These are called Super Grainbags.Phil Villers,the companys president,says storing a harvest safely not only helps farmers earn more money,but also reduces the amount of the harvest loss to insects,spoilage and mishandling.“What does not get wasted means it is possible to feed a hungry world,” said
10、 Phil Villers.1What is the best title for this passage?A.Simple Bags Save the HarvestB.Plastic Bags Kill the InsectsC.Bruchids Do Harm to the HarvestD.Pesticides Threaten Food Safety解析本文属新闻报道类文章,开头即点明了本文的中心,故选A项。答案A2It can be inferred that bruchids .A.steal the stored crops for their futureB.survive
11、 in airtight plastic bagsC.grow slowlyD.breed fast解析从第二段“which grow from eggs to adults in a few weeks and then lay forty to sixty eggs.They can destroy the whole harvest within months.”可知选D项。答案D3How does the name of “killer beans” come out?A.The beans are poisonous by nature.B.People eat beans that
12、 are infected by bugs.C.Farmers use chemicals to kill bugs improperly.D.Bugs ruin beans within a short time.解析从第三段“They end up misusing or overusing the pesticide.In Nigeria,a lot of cases of death have been reported.They usually call cowpeas killer beans in Nigeria.”可知选C项。答案C4Which of the following
13、 statements is NOT true?A.Any insects in the bags will soon use up the air and then die.B.The airtight plastic bags currently sold on the market do not last long.C.The project provides the farmers with the bags for free at present.D.What farmers can earn from the use of the bags is more than they ha
14、ve to pay.解析从第四段“He says the storage bags are thick enough so that any insects already in the cowpeas will die from a lack of oxygen.”可知A项正确;从第四段“Donors currently support the project”可知现在为农民提供免费的塑料袋,故C项正确;从第四段“get a better price for their crops”可知D项正确;文章提到免费为农民提供塑料袋持续的时间不会长,而不是市场上卖的塑料袋用的时间不够长,可知应选B项
15、。答案BB(2017全国高考)A build-it-yourself solar still(蒸馏器) is one of the best ways to obtain drinking water in areas where the liquid is not readily available.Developed by two doctors in the U.S.Department of Agriculture,its an excellent water collector.Unfortunately,you must carry the necessary equipment with you,since its all but impossible to find natural substitutes.The only components required,though,are a 55 sheet of clear or slightly milky plastic,six feet of plastic tube,and a containerperhaps just a drinking
