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C.Going to school in one's late forties is a hard decisionD.A girl was proud of her dad's accomplishment0A demonstration mission to test an idea to clean up space debris (was launchedMonday morning local time from the Baikonur Cosmodrome in Kazakhstan.Known asELSA-d,the mission will exhibit technology that could help catch space junk,the millions ofpieces of orbital debris that float above Earth.The more than 8,000 metric tons of debris threaten the services we rely on for life,inclu-ding weather forecasting,telecommunications and GPS systems.The spacecraft works by attempting to attach itself to dead satellites and pushing themtoward Earth to burn up in the atmosphere.It is not designed to catch dead satellites alreadyin orbit,but rather future satellites that would be launched with compatible docking plates onthem.ELSA-d,which stands for End-of-Life Services by Astroscale,will be carried out by a"servicer satellite"and a "client satellite"that are launched together.Using a magnetic doc-king technology(磁性对接技术)，the servicer will release and try to“rendezvous”with theclient,which will act as a mock(模拟的)piece of space junk.The mission,which will be run from the UK,will carry out this catch and release processrepeatedly over the course of six months.The goal is to prove the servicer satellite's ability totrack down and dock with its target in varying levels of complexity.Space junk has been a growing problem for years.as human-made objects such as old satel-lites and spacecraft parts build up in low Earth orbit until they decay,deorbit,explode or hitother objects,breaking into smaller pieces of waste.In 2019,for example,India blew apartone of its satellites orbiting Earth,creating hundreds of pieces of debris that threatened to hitthe International Space Station.According to a recent report by NASA,at least 26,000 of the millions of pieces of spacejunk are the size of a softball.Orbiting along at 17,500 mph,they could destroy a satelliteinservice.More than 500,000 pieces are a mission-ending threat because of their ability to im-pact protective systems,fuel tanks and spacecraft cabins.28.What is the purpose of the launch of ELSA-d?A.To cooperate with the International Space Station.B.To pave the way for future satellite launches.全国10所名校最新高考冲刺卷第6页（共12页）【22·CC·英语（三）一】
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