點(diǎn)擊查看：2015年6月英語四級仔細(xì)閱讀練習(xí)及答案解析匯總

　　Questions 56 to 60 are based on the following passage.

　　Arctic Ocean ice may hold trillions of small pieces of plastic and other synthetic trash，and they are being released into the world’s oceans as global warming melts the polar cap，researchers say,Though the finding is surprising and worrying，the possible harm to marine life is so far unknown，the authors concluded.called micro plastics，the pollutants come mostly from debris that has broken apart，as well as from cosmetics and fibers released from washing clothes，according to the Study,which was published in the iournA. Earth’s Future and first reported by Science magazine.

　　At current melting trends.more than l trillion pieces 5 millimeters or smaller could wind up in the oceans during the coming decade.the authors estimate.The concentration of plastic debris is 1，000 times greater than that floating in the so.called Great Pacific Garbage Patch.The researchers based their findings on core samples of ice taken during polar expeditions in 2005 and 2010.

　　Rayon was the most colninon synthetic material discovered—54%.Though rayon is not a plastic(it’s made from wood),the authors included it“because it is a manmade semi.synthetic that makes up a significant proportion of synthetic microparticles found in the marine environment.”Rayon is used in cigarette filters，clothing and personal hygiene products.Polyester(聚酯)was the next most common pollutant found in the ice(21%)，followed by nylon(16%)，polypropylene(聚丙烯)(3%)and polystyrene，acrylic and polyethylene (2%each).

　　The authors cA.led the ice trap“a major historic globA. sink of man.made particulates.”and said their findings“go some way to help clarify one of the most puzzling aspects of current understanding on the quantities of plastic debris reported in the oceans.”As Science points out，288 million tons of plastics were produced in 2012.

　　Micro plastics garbage has aso been found on the shores of southernmost Chile，so the authors said it’s time to investigate the planet’s other polar region.“WHile multiyear sea ice makes up a smaller proportion of aunual sea ice cover in the Southem Ocean.and perenniA. sea ice cover around Antarctica is following different trends,our finding indicate the importance of sampling ice from the Antarctic to see if it too contains micro plastics，”they write.

　　56.According to the passage.what are mainly called“micro plastics”?

　　A.The pollutants come mostly from debris.

　　B.The pollutants come mostly from fibers.

　　C.The pollutants come mostly from cosmetics.

　　D.The pollutants come mostly from daily supplies.

　　57.What does the phrase“wind uP”mean in Para.2?

　　A.putan endto

　　B.screwup

　　C.sweep across

　　D.roll up

　　58.Why does the author include“rayon”in.though it is not a plastic?

　　A.Because it is a significant manmade semi.synthetic discovered in the ocean.

　　B.Because it is a major natural semi.synthetic appearing in the marine.

　　C.Because it is a minor manmade synthetic dug out in the marine.

　　D.Because it is a significant natural synthetic explored in the marine.

　　59.What can we infer from the ice trap“a major historic global sink of mail-made particulates”?

　　A.The historic sink should be attributed to man-made particulates.

　　B.People on a worldwide scA.e have reaped what they had sown.

　　C.The ice trap is of major historic meaning on the globA. context.

　　D.The major historic globA. sink is derived from the ice melting.

　　60.What’s the best title of this passage?

　　A.Rayon was the most common synthetic in the ocean.

　　B.It’s time to research the planet’s other polar region.

　　C.Trillions of plastic pieces found in the Arctic ice.

　　D.Trillions of plastic pieces will wind up in the ocean.

　　56.According to the passage，what are mainly called“micro plastics”?根據(jù)文章，哪些東西都被稱為“微塑料”?

　　A.The pollutants come mostly from debris.主要是一些碎片污染物。

　　B.The pollutants come mostly from fibers.主要是一些纖維污染物。

　　C.The pollutants come mostly from cosmetics.主要是一些化妝品污染物。

　　D.The pollutants come mostly from daily supplies.主要是一些日常用品污染物。

　　57.What does the phrase‘'wind up”mean in Para.27第二段中“wind up”是什么意思?

　　A.putan endto結(jié)束

　　B.screwup擰緊

　　C.sweep across席卷

　　D.rollup卷起

　　58.Why does the author include“rayon”in，though it is not a plastic?為什么研究人員要把“rayon”也算在內(nèi)，盡管它并不是塑料?

　　A.Because it is a significant manmade semi-synthetic found in the ocean.因?yàn)樗�是海洋中發(fā)現(xiàn)的重要的人造半合成品。

　　B.Because it is a major manmade synthetic appearing in the marine.因?yàn)樗�是海洋中出現(xiàn)的主要的人造半合成品。

　　C.Because it is a minor manmade synthetic dug out in the marine.因?yàn)樗�是海洋中挖掘出來的少�?shù)的人造半合成品。

　　D.Because it is a minor manmade semi.synthetic explored in the marine.因?yàn)樗�是海洋中探測出的少數(shù)的人造半合成品。

　　59.What Can we infer from the ice trap“a major historic globA. sink of man.made particulates”?從“此次的冰陷是‘具有重大歷史意義的全球性人造微粒造成的陷阱’”這句話中能推斷出什么?

　　A.The globA. ice trap should be attributed to man.made particulates.此次全球性的冰陷應(yīng)該歸因于人造微粒。

　　B.People onaworldwide scalehave reapedwhattheyhad sown.全球范圍內(nèi)的人們都已經(jīng)自食其果。

　　C.The ice trap is ofmajor historic meaning on the global context.此次冰陷具有重大的歷史意義。

　　D.The major historic global sink is derived from the ice melting.具有重大歷史意義的全球性冰陷是海冰消融的結(jié)果。

　　60.What’s the best title of this passage?哪一個是本文的最佳題目?

　　A1 Rayon the most comn20n semi.synthetic in the ocean.人造纖維是海洋中比例最大的半合成品。

　　B.It’s time to research the planet’S other polar region.是時候研究地球的其他極地了。

　　C.Trillions ofplastic pieces found in the Arcticice.北冰洋中發(fā)現(xiàn)的數(shù)萬億的塑料碎片。

　　D.Trillions ofplastic pieces winding up in the oceans.即將席卷整個大洋世界的數(shù)萬億塑料碎片。

關(guān)注"566四六級"微信，第一時間獲取查分信息！

英語四六級題庫【手機(jī)題庫下載】 | 微信搜索"566四六級"

　　相關(guān)推薦：

　　四六級題庫 歷年真題視頻解析上線 立即觀看>>

　　2015年6月英語四級選詞填空練習(xí)及參考譯文匯總

　　2015四級長篇閱讀段落信息匹配題及答案解析匯總