• 
    

    
    

      99热精品在线国产_美女午夜性视频免费_国产精品国产高清国产av_av欧美777_自拍偷自拍亚洲精品老妇_亚洲熟女精品中文字幕_www日本黄色视频网_国产精品野战在线观看 ?

      主題語境十三:世界與環(huán)境

      2020-02-21 03:47:42蔣建平
      瘋狂英語·新策略 2020年1期
      關(guān)鍵詞:篇幅水循環(huán)應(yīng)用文

      Ⅰ.閱讀理解

      體裁:說明文 篇幅:3 4 7 建議用時(shí):7分鐘文本來源:2 0 1 8·北京卷 新穎度:★★★★ 主題意義:大蠟螟為解決塑料污染提供了新的途徑

      Plastic-Eating Worms

      Humans produce more than 300 million tons of plastic every year.Almost half of that winds up in landfills(垃圾填埋場(chǎng)),and up to 12 million tons pollute the oceans.So far there is no effective way to get rid of it,but a new study suggests an answer may lie in the stomachs of some hungry worms.

      Researchers in Spain and England recently found that the worms of the greater wax moth can break down polyethylene,which accounts for 40%of plastics.The team left 100 wax worms on a commercial polyethylene shopping bag for 12 hours,and the worms consumed and broke down about 92 milligrams,or almost 3%of it.To confirm that the worms'chewing alone was not responsible for the polyethylene breakdown,the researchers made some worms into paste(糊狀物)and applied it to plastic films.14 hours later the films had lost 13%of their mass—apparently broken down by enzymes(酶)from the worms'stomachs.Their findings were published inCurrent Biologyin 2017.

      Federica Bertocchini,co-author ofthe study,says the worms'ability to break down their everyday food—beeswax—also allows them to break down plastic.“Wax is a complex mixture,but the basic bond in polyethylene,the carbon-carbon bond,is there as well,”she explains.“The wax worm evolved a method or system to break this bond.”

      Jennifer DeBruyn,a microbiologist at the University of Tennessee,who was not involved in the study,says it is not surprising that such worms can break down polyethylene.But compared with previous studies,she finds the speed of breaking down in this one exciting.The next step,DeBruyn says,will be to identify the cause of the breakdown.Is it an enzyme produced by the worm itself or by its gut microbes(腸道微生物)?

      Bertocchini agrees and hopes her team's findings might one day help employ the enzyme to break down plastics in landfills.But she expects using the chemical in some kind of industrial process—not simply “millions of worms thrown on top of the plastic.”

      1.What can we learn about the worms in the study?

      A.They take plastics as their everyday food. B.They are newly evolved creatures.

      C.They can consume plastics. D.They wind up in landfills.

      2.According to Jennifer DeBruyn,the next step of the study is to _______.

      A.identify other means of the breakdown B.find out the source of the enzyme

      C.confirm the research findings D.increase the breakdown speed

      3.It can be inferred from the last paragraph that the chemical might_______ .

      A.help to raise worms B.help make plastic bags

      C.be used to clean the oceans D.be produced in factories in future

      4.What is the main purpose of the passage?

      A.To explain a study method on worms. B.To introduce the diet of a special worm.

      C.To present a way to break down plastics. D.To propose new means to keep eco-balance.

      Ⅱ.補(bǔ)全信息

      體裁:說明文 篇幅:2 6 9 建議用時(shí):6分鐘文本來源:原創(chuàng) 新穎度:★★★★ 主題意義:大自然的水循環(huán)和人類參與的水循環(huán)

      In one way or another,all our water comes from the sea.The vapor rises and freezes to form clouds.These clouds release their water as rain,often when they are blown over high ground.Rain goes deep into the ground,runs into streams and rivers,and flows back into the sea.Also,plants take water from the soil and put some back into the air as vapor.In this way,water is always being recycled.

      Human beings also take part in the water cycle.We build reservoirs(水庫(kù))to trap water for our houses and factories.

      Some water takes many thousands of years to complete the cycle.It collects in huge areas of underground.This kind of water is often used by people as a source of tap water.People around the world use tap water in their daily life.A lot of reservoirs have been built and they have brought many changes to the landscape and affected wildlife.People do not know the fact that taking too much water from underground can change the conditions on the surface.For example,it can dry out the habitats of some wildlife.If sewage(污水)or chemical waste is not made clean carefully,they can make drinking water dirty.

      A.It is important that we should use water in a responsible way.

      B.There are many problems with the use of tap water.

      C.This is called the water cycle.

      D.Learning how to recycle water not only saves you money,but also is good for the planet.

      E.The sun heats the sea,and water evaporates to become vapor.

      F.Our waste water and sewage is put back into the sea though it is sometimes purified first.

      G.Many rivers and lakes are being polluted by the waste water from factories.

      Ⅲ.短文改錯(cuò)

      體裁:記敘文 篇幅:1 1 3 建議用時(shí):7分鐘文本來源:改編 新穎度:★★★ 主題意義:地球日活動(dòng)

      A week before Earth Day,posters were put up around our school,called on us to take part the action for a greener earth.Our class came up with the idea of making a better use of used materials.We bring worn-out clothes and empty plastic bottles but turned them into dolls and handbags.That weekends,we went to a nearby neighborhood and gave away that we had made to the people there.Everyone was very happily with those gifts,especially little kids and elderly people.We did such well that we were invited by our headmaster to share this meaningful experience and our ideas with all the students of their school.

      Ⅳ.書面表達(dá)

      體裁:應(yīng)用文 命題形式:新聞報(bào)道 建議用時(shí):2 0分鐘文本來源:原創(chuàng) 新穎度:★★★★ 命題立意:考查應(yīng)用文中新聞報(bào)道的寫作,半開放性作文

      上周日,你班開展以“美化城市環(huán)境,倡導(dǎo)低碳生活”為宗旨的志愿者活動(dòng)?;顒?dòng)內(nèi)容包括:上午去郊區(qū)植樹;下午去廣場(chǎng)宣傳,分發(fā)傳單。請(qǐng)你就這個(gè)活動(dòng)為校報(bào)寫一篇題為“A voluntary activity”的新聞報(bào)道。內(nèi)容包括:

      1.活動(dòng)內(nèi)容與宗旨;

      2.對(duì)同學(xué)的影響;

      3.你的評(píng)價(jià)。注意:

      1.詞數(shù)100左右;

      2.可以適當(dāng)增加細(xì)節(jié),以使行文連貫。

      參考詞匯:傳單leaflet 郊區(qū)suburb 低碳生活a low-carbon lifestyle

      A voluntary activity

      Last Sunday,our class launched a voluntary activity.____________________________________

      猜你喜歡
      篇幅水循環(huán)應(yīng)用文
      用袋裝水模擬水循環(huán)
      Britain's“Shark House”
      硫酸法鈦白粉水洗及水循環(huán)膜處理工藝
      化工管理(2021年7期)2021-05-13 00:46:24
      應(yīng)用文寫作:語言簡(jiǎn)練、得體、有效
      高職應(yīng)用文寫作教學(xué)改革與創(chuàng)新
      活力(2019年21期)2019-04-01 12:18:24
      高職應(yīng)用文教學(xué)方法初探
      新課程研究(2016年3期)2016-12-01 05:54:16
      關(guān)于高職《應(yīng)用文寫作》教學(xué)改革的思考
      水循環(huán)高效礦井乏風(fēng)熱泵系統(tǒng)分析與應(yīng)用
      同煤科技(2015年4期)2015-08-21 12:51:02
      太陽能水循環(huán)空調(diào)
      寄小讀者的信
      大渡口区| 定远县| 万山特区| 汝阳县| 江陵县| 库尔勒市| 玉门市| 通河县| 息烽县| 宾川县| 郯城县| 三门峡市| 吉木萨尔县| 蒲江县| 濮阳县| 吉木萨尔县| 改则县| 荣成市| 天祝| 苍山县| 和林格尔县| 民丰县| 南昌县| 广德县| 阳新县| 保定市| 方正县| 澄江县| 永善县| 班玛县| 广南县| 泊头市| 中卫市| 宝丰县| 垫江县| 江西省| 闽侯县| 平原县| 瑞安市| 道真| 钦州市|