九师联盟·2025届全国高三单元阶段综合卷(一)英语试题

2024-07-28 01:45:32 3

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全国@0所名校高三单元测试示范卷札记求，但任何继续工作的请求都被“拒绝”了。27.C根据最后一段可知，虽然麦哲伦的船队由五艘满载物品的船只组成，但这根本不够满足他提议的航行距离的需求。由此看来，这是一次雄心勃勃的环球航行。在航行过程中，他们经历了战斗和伤亡，因此这也是一次极具挑战性的环球航行。At present,more than 5,465 operational satellites are orbiting Earth.But the growing concernis the inoperative satellites,spent rockets and debris(H)that also crowd the region-collectivelycalled space debris or space junk.By 2020,2,200 operational satellites had been joined by about 34,000 pieces of debris 10 cm indiameter or larger,roughly 900,000 objects from 1 cm to 10 cm,and more than 128,000,000 piecesunder 1 cm.While debris can re-enter and burn up in Earth's atmosphere,the process can takeyears.Space junk can impact operational spacecraft,producing even more debris of all sizes.This isknown as "the Kessler syndrome",named after NASA scientist Donald J.Kessler,who presumedspacecraft and orbital debris could reach such a density (that each impact generates moredebris and a greater likelihood of collisions().One possible effect is the use of satellites in low-Earth orbit being unworkable for many years.Instead of letting spacecraft die out at the end of their missions,operators should ensure theyhave enough fuel to make the decision to send them into an alternate orbit or to let them return toEarth's atmosphere.Researchers in Japan are even experimenting with wooden spacecraft tominimize the poisonous levels of debris introduced into Earth's upper atmosphere when spacecraftde-orbit.But what about the junk that's already out there?Researchers are seeking some uniquesolutions.One solution is sending tons of tungsten dust into space,enough to form a cloud aroundthe planet,to which space junk would stick,causing it to become heavier and fall back to Earth.Another solution is by repairing,repurposing,and recycling satellites at a facility in Earth's orbit,we could use what's already floating out there to build future spacecraft.To keep space junk to a minimum and allow us to effectively use low-Earth orbit for futureexploration,we need combined efforts on multiple fronts to both decrease existing space debris andprevent the generation of future debris.However,we've still got a long way to go.28.What does the author aim to stress by listing figures in paragraph 2?A.The huge amount of space junk.B.The large number of space resources.C.The difficulty of operating present satellitesD.The great achievements of space exploration.29.What effect could debris collisions have according to Kessler?A.Causing debris to burn itself up.B.Speeding up the debris'disappearance.C.Destroying the distribution of satellites.D.Making certain satellites unusable for years.30.Why are Japanese researchers experimenting with wooden spacecraft?A.To cut costs of spacecraft.B.To reduce the harm of debris.C.To enable them to return to Earth.D.To send them to other orbits easily.25·G3DY(新高考)·英语-WYB-必考-N

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