Unit 2 Out of this world Section Ⅲ　Integrated skills 课件（共71张）+学案（含答案）+练习（含答案）

Section Ⅲ　Integrated skills Ⅰ.阅读理解 A 　　It’s fascinated us for centuries， inspiring astronomers， science fiction writers and more than a few star-gazing entrepreneurs （凝视星空的企业家） who have plans to launch their own missions to Mars.But will we really ever land on the red planet where a year lasts 687 days？ 　　After the Apollo Moon missions in the 1970s， sending astronauts to Mars seemed the next logical step， but it would be a “giant leap”.At this point， the success rate of our robot missions does not inspire confidence.Russia has launched 21 Mars rockets to date， including five unmanned landers， but only two orbiters completed their missions.The US has been more successful， losing only five out of 23 missions.Clearly， some more work is needed before we can consider sending humans to Mars. 　　But， sooner or later， we will go.And one thing that can be done in the meantime is to test human psychological endurance （承受力） for such a mission.These testing conditions have been simulated （模拟） on Earth in order to evaluate their effect on people.One example is Mars 500， a Russian/European/Chinese project carried out between 2007 and 2011 in an isolation facility in a Moscow car park.It ended after a 520-day stay by six volunteers.They claimed to have stayed in good health throughout， but some avoided exercise and hid from their co-workers， and four had difficulty sleeping. 　　Mars Society president Robert Zubrin has a mission plan that， he believes， will be safer and cheaper than any other.It involves launching an unmanned Earth Return Vehicle （ERV） that would land on Mars and use solar or nuclear power and imported hydrogen to produce methane （甲烷） and oxygen from Martian CO2.In other words， rocket fuel.This means that humans would set out once they knew there would be a fuelled return vehicle waiting for them on Mars.And because most of the fuel for the return trip would be made on Mars， Zubrin believes huge energy and cost savings could be made. 1.What does the author think of our robot missions to Mars so far？（　　） A.They are inspiring. B.They are improving. C.They are unnecessary. D.They are unsatisfactory. 2.What was the purpose of Mars 500 according to Paragraph 3？（　　） A.To study how teamwork matters in space missions. B.To enhance the psychological qualities of astronauts. C.To compare the differences between Earth and Mars. D.To find out how conditions on Mars may impact humans. 3.What does the underlined word “This” in the last paragraph refer to？（　　） A.The unique feature of Martian CO2. B.The strong fuel delivery of return vehicles. C.The ability to produce rocket fuel on Mars. D.The successful launch of an unmanned ERV. 4.What is the best title for the text？（　　） A.Does Life Really Exist on Mars？ B.Will We Ever Set Foot on Mars？ C.Is Living on Mars Even a Good Idea？ D.Why Are We So Fascinated with Mars？ B 　　In the hours after Hurricane Katrina struck America in 20 ... ...