2020-2021学年高中英语 Unit 4 Space Exploration单元综合随堂小练(含解析)新人教版必修第三册.doc
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- 2020-2021学年高中英语 Unit Space Exploration单元综合随堂小练含解析新人教版必修第三册 2020 2021 学年 高中英语 Exploration 单元 综合 随堂小练
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1、Unit 4 Space Exploration1、Going to bed early is considered to be a good habit.It is considered to be a good habit _.2、_(save) class time, our teacher has us students do half of the exercises in class and complete the other half as our homework.3、The river is a beautiful place _(visit).4、Sometimes I
2、act as a listener for fellow students_(talk) over what is bothering them.5、In factories,robots will be used to perform some dangerous jobs avoid accidents.6、I did all thatI could express myself clearly but my speech was a total failure.7、Hes leaving this position, because his term of office _.他就要离开这
3、个工作岗位了,因为他的任期已满。8、You had better _ a recent photograph _ your application form.你最好在申请表上贴一张近照。9、 An experimental clean-up device called RemoveDEBRIS has successfully cast a net around a dummy(仿真的) satellite, simulating a technique that could one clay collect spaceborne garbage. The test,which was car
4、ried out this week, is widely believed to be the first successful demonstration of space clean-up technology, experts told CNN. And it symbolizes an early step toward solving what has already been a critical issue: junk in space. Millions of pieces of space junk are turning around in orbit, the resu
5、lt of 50 years of space travel and few regulations to keep space clean. At orbital speeds, even a small bit of paint crashing with a satellite can cause critical(严重的) damage. Various companies have plans to send thousands of new satellites into low-Earth orbit, already the most crowded area. The Rem
6、oveDEBRIS experiment is run by a company and researchers led by the U. K.s Surrey Space Centre and includes Airbus, Airbus-owned SurreySatellite Technology Ltd. and Fiances ArianeGroup. Guglielmo Aglietti, director of the Surrey Space Centre,said that an operational version of the RemoveDEBRIS techn
7、ology would cast a net that remains fastened to the main satellite so the debris(碎片) can be dragged out of orbits. It could target large pieces of junk, includingdead satellites up to 10 meters long. The RemoveDEBRIS satellite will conduct a few more experiments in the coining months, including test
8、ing navigation features that could help guide the satellite to a specific piece of debris. There are still enormous barriers to clear before operational clean-up tasks are underway, he said, and the most discouraging is figuring out how to fund such projects. Aglietti, the Surrey professor who helpe
9、d lead the RemoveDEBRIS project, said, The challenge will lie in persuading the relevant authorities to sponsor these tasks. Aglietti said he hopes RemoveDEBRIS will conduct a few clean-up tasks per year, targeting the largest pieces of junk in the most crowded orbits.1.What is the use of the Remove
10、DEBRIS satellite?A.Disposing of space wastes.B.Demonstrating space technology.C.Imitating a developing technique.D.Solving serious junk problems.2.How does the RemoveDEBRIS satellite work?A.By throwing a net to take the junk from orbits.B.By fastening it to the main satellite tightly.C.By dragging s
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