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本文从以下几个角度介绍。

1、2024全国100所名校最新高考模拟示范卷·英语卷(四)
2、2024普通高中名校联考信息卷模拟一英语
3、2024年全国高考信息模拟试卷一英语
4、2023-2024全国百所名校最新高考模拟示范卷英语
5、全国百校联盟2024年高考模拟信息卷英语二
6、2024全国100所名校最新高考模拟示范卷英语
7、2023-2024全国100所名校最新高考模拟示范卷英语卷四
8、全国百校联盟2024年高考模拟信息卷英语
9、2024全国100所名校最新高考模拟示范卷英语卷
10、全国百校联盟2024年高考模拟信息卷四

教学全国@0所名校单元测试示范卷札记DFlying someone one-way from London,England,to New York City produces nearly a ton ofcarbon dioxide.That's a lot of climate-warming greenhouse gas.But there are ways to cut the cli-mate effect of flying.One new way is to ask planes to surf high-altitude winds every chance they get.Most jets crossing the Atlantic Ocean follow one of several fixed paths that are widely spaced.The reason is that radar isn't able to track aircraft everywhere above the Atlantic.But a new network of satellites in low-Earth orbit (could soon change that.They'll al-low people to track these flights throughout their route."Instead of having to have these fixedtracks which keep the planes apart,airlines can fly much more flexible routes,says Cathie Wells.She is a PhD student in mathematics who led the analysis.She works at the University of Readingin England.Wells was part of a team in England that calculated the fastest possible routes for pas-senger planes.Travel time alters with the winds that a plane meets.For example,eastbound (flights can get a powerful push from the strong jet stream.That's a powerful current of air flowingfrom west to east across the Atlantic.Westbound routes miss that benefit.But they could avoidunfavorable headwinds that would otherwise lengthen a trip.Faster flights burn less fuel.Andless burning gives off fewer greenhouse gases.For its new study,the team analyzed 35,000 eastbound and westbound flights between NewYork's Kennedy Airport and Heathrow Airport in London.Jet streams vary a lot in winter,some-times reaching speeds of more than 320 kilometers (200 miles)per hour.This means that bestflight times would tend to vary more at this time of year.So the new study looked at all flightsthat took place over three months,starting on December 1,2019.On average,routes making the best use of wind help would have taken less time than the ac-tual flights did,the group showed.One particular eastbound flight could have saved one-sixth ofthe fuel it actually burned.32.Why are planes suggested surfing high-altitude winds?A.To make them safe.B.To avoid terrible weather.C.To protect the environment.D.To make the trip pleasant.33.What does the underlined word "alters"in paragraph 4 mean?A.Flies.B.Changes.C.Tightens.D.Lengthens.34.Why was the new study carried out in the winter?A.To benefit from dry air.B.To have strong air currents.C.To get favourable research conditions.D.To check flights in low temperatures.35.What is the main idea of the text?A.Surfing the winds would make future jets travel greener.B.Travel time varies with the winds that a plane encounters.C.Making flight routes more flexible could burn less fuel.D.Fixed routes can help jets make better use of winds.【答案与解析】飞机可以借助气流的推动力，缩短飞行时间，以此来减少二氧化碳的排放量。32.C根据第1段可知，飞机被建议在高空飞行是为了减少二氧化碳的排放量，保护环境。33.B根据画线词下文可知，飞机飞越大西洋时，如果顺风飞行，可以借助风力，减少飞行时间；反之逆风飞行，就会增加飞行时间。所以飞机的飞行时间随风向发生政变。70【23新教材·DY·英语-BSD-选择性必修第三册-QG】