通用版2019版高考英语一轮复习Unit3Inventorsandinventions高考拆组训练新人教版选修820180426139

  • 格式:doc
  • 大小:530.50 KB
  • 文档页数:7

Unit 3 Inventors and inventions练(一) 语言知识运用组块专练——练准度(限时:25分钟)Ⅰ.完形填空Resealable (可密封的) plastic bags — sometimes called by a brand name, such as Ziploc®— are those little clear plastic bags you use to keep your sandwiches and chips fresh. They usually have some sort of sealing mechanism, like a plastic zipper, which allows you to seal the bag to keep __1__ out.Keeping air away from __2__ allows them to stay fresh longer.Bacteria and other organisms in the air will __3__ food itemsover time if allowed to come into __4__ with them. Sealedplastic bags keep these organisms __5__ getting to your food.Resealable plastic bags can be used for more than just __6__sandwiches, chips and snacks to school for lunch. They’re also used to keep leftovers __7__ in the refrigerator. Many people also use them to __8__ food in the freezer for use in the future.The __9__ of the resealable plastic bag started out in 1951 at a company named Flexigrip, Inc. Flexigrip __10__ a plastic zipper from patents which was bought from __11__ Borge Madsen. These zippers were __12__ used as parts of binders and briefcases.Over time, __13__, plastic zipper bags were developed. Eventually, in 1968, Dow Chemical Company __14__ to market its Ziploc® brand of resealable plastic bags to grocery stores. They turned out to be very __15__.Today, these types of bags are __16__ in many different sizes and styles, from snack and sandwich bags to craft and freezer bags. You can also buy bags with expandable bottoms that __17__ on their own. Some bags even allow you to __18__ food in the microwave!However, now many people try to use __19__ plastic because of its effect on the environment. So manufacturers of resealable plastic bags have taken __20__ to become more environmentally friendly.C.dust D.fog解析:选A 由第二段开头的“Keeping air away”可知,此处指把空气阻挡在外面。

2.A.plants B.containersC.bags D.foods解析:选D 根据下文中的“Bacteria and other organisms in the air will __3__ food items over time”可知,此处指让空气和食物隔离,以便食物保鲜的时间长些,故选foods。

3.A.bring in B.take outC.break down D.deal with解析:选C 空气中细菌和其他微生物会分解食物导致食物变质。

break down意为“分解”。

4.A.relation B.contactC.connection D.contract解析:选B 如果细菌和其他微生物与食物接触,食物将会很快变质。

contact意为“接触”;relation意为“关系”;connection意为“连接”;contract意为“合同”。

5.A.from B.againstC.through D.beyond解析:选A keep ... from ...为固定搭配,意为“阻止……”。

6.A.following B.presentingC.supplying D.transporting解析:选D 下文中的“to school for lunch”说明,此处指携带食物到学校。

7.A.wet B.freshC.thin D.hard解析:选B 根据句中的“in the refrigerator”及生活常识可知,它们也被用来保持剩余的食物新鲜。

8.A.store B.cookC.share D.produce解析:选A 本段主要介绍可密封塑料袋能用来保存食物,因此这里指储存食物。

9.A.result B.humourC.history D.success解析:选C 根据下文中的“started out in 1951 at a company named Flexigrip, Inc”可知,此处提到这种可密封塑料袋的历史。

10.A.discovered B.developedC.spread D.approved解析:选B 此处表示买了专利以后,研发了塑料拉链。

C.doctor D.inventor解析:选D 句中patents说明,博尔格·马森是一位发明家。

12.A.eventually B.frequentlyC.originally D.naturally解析:选C根据下文中的“Over tim e, __13__,plastic zipper bags were developed.”可知,此处谈的是塑料拉链袋的最初情况,故选originally。

eventually意为“终于”。

13.A.however B.besidesC.therefore D.otherwise解析:选A 最初,塑料拉链袋的用途很少,后来它得到了发展。

此处表示转折。

14.A.agreed B.beganC.promised D.preferred解析:选B 最后,陶氏化学公司开始将塑料拉链袋投入市场。

15.A.necessary B.famousC.funny D.popular解析:选D 文章介绍了这种塑料袋的发展。

它也很受欢迎。

16.A.precious B.expensiveC.available D.fashionable解析:选C 根据“in many different sizes and styles, from snack and sandwich bags to craft and freezer bags”可知,这些袋子有很多不同的尺寸和样式,在很多地方可以使用。

17.A.move B.standC.float D.remain解析:选B 根据句中的“bags with expandable bottoms”可知,袋子底部可伸展,因此它能竖起来。

18.A.heat B.tasteC.find D.purchase解析:选A 根据“in the microwave”可知,把食物放入微波炉中,为的是给食物加热。

19.A.more B.smallerC.larger D.less解析:选D 根据“because of its effect on the environment”可知,人们现在尽量少使用塑料袋。

C.photos D.orders解析:选B 他们已经采取措施以使他们的产品更加环保。

take steps意为“采取措施”。

Ⅱ.语法填空Scientists have discovered that __1__ (stay) in the cold could help us lose weight. Researchers at the University of California found that exposure to the cold increases levels of a protein that helps form brown fat — the type of fat that produces heat and keeps us warm. Brown fat burns energy, __2__ helps us lose weight. White fat stores extra energy, which results __3__ weight gain. The researchers said that because air conditioning and heating give us constant, __4__ (comfort) temperatures, our body’s need for brown fat has decreased. They found that, “Outdoor workers in northern Finland who __5__ (expose) to cold temperature have __6__ significant amount of brown fat when __7__ (compare) to same­aged indoor workers.”The research was conducted on two different control groups of mice. __8__ group was injected with the protein that helps create brown fat. This group later gained 30% l ess weight after both groups were fed high­fat diets. The researchers say this could be good news in the fight against obesity (肥胖症). People who are obese have __9__ (low) levels of brown fat than thinner people. Head researcher Hei Sook Sul said, “This pr otein could become an important target for research into the treatment and prevention of obesity and obesity­related diseases.” She added, “If you can somehow increase levels of this protein, you could __10__ (possible) lose more weight even if eating the same amount of food.”语篇解读:科学家发现在寒冷的环境下有助于减肥。