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1、Unit 4 Astronomy the science of the stars第卷第一部分阅读理解(共两节，满分40分)第一节(共15小题；每小题2分，满分30分)阅读下列短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项。AAstronauts aboard the space station celebrated a space first on Wednesday by drinking water that had been recycled from their urine and sweat and water that condenses from exhaled
2、air.They said “cheers”，clicked drinking bags and toasted NASA workers on the ground who were sipping their own version of recycled drinking water.The recycling system is needed for astronaut stations on the moon and Mars.It also will save NASA money because it wont have to ship up as much water to t
3、he station by space shuttle or cargo rockets.Besides，its important as the space station is about to expand from three people living on board to six.The recycling system had been brought up to the space station last November by space shuttle Endeavour，but it couldnt be used until samples were tested
4、back on Earth.So when it came time to actually drink up，NASA made a big deal of it.The threemen crew stood，holding their drinks and congratulated engineers in two NASA centers that worked on the system.“This is something that had been the stuff of science fiction，” Barratt said before taking a small
5、 mouthful.“The taste is worth trying.”NASA deputy space shuttle manager LeRoy Cain called it “a huge milestone”The new system takes the combined urine of the crew from the toilet，moves it to a big tank，where the water is boiled off，and the vapor is collected.The rest of the urine is thrown away.The
6、water vapor is mixed with water from air condensation，and then it goes through filters.When six crew members are aboard it can make about six gallons from urine in about six hours.“Some people may find the idea of drinking recycled urine distasteful，but it is also done on Earth with a lot longer tim
7、e between urine and the tap.” said Marybeth Edeen，the space stations national lab manager.“The technology NASA developed for this system has already been used for quick water purification after the 2004 Asian tsunami，” Edeen said.“We are happy to have this water work through the systemwere happy to
8、have it work through our systems，” Barratt said.1According to the text，the recycling system is important because .Ait makes traveling to the moon for the common person possibleBwith it NASA won t need to ship any water up to the space stationCit can help to meet the need for more water after the cre
9、w are expandedDit protects the environment in space by reducing the amount of waste答案C解析细节理解题。根据第二段中的“.its important as the space station is about to expand from three people living on board to six.”可知C项正确。2What is the RIGHT time order of the following events?aThe samples of the recycled water were
10、tested on Earth.bAstronauts celebrated the space first of making water from urine.cThe recycling system was brought up to the space station.dThe technology for the system was used to quickly purify water.Aa，d，c，b Ba，c，b，dCd，a，c，b Dd，c，a，b答案D解析细节理解题。根据倒数第二段的“The technology NASA developed for this sys
11、tem has already been used for quick water purification after the 2004 Asian tsunami”可知d发生最早；根据第三段的“The recycling system had been brought up to the space station last November.couldnt be used until samples were tested back on Earth.”可知c发生在a的前面，因此D项正确。3From Paragraph 6 we can know .Athe theory behind
12、the recycling systemBthe effect of the recycling systemCthe process of the recycling systemDan opinion on the recycling system答案C解析段落大意题。该段主要讲述的是使用尿液循环系统将尿制成水的过程。4What is the best title for the passage?AThe research of NASA has made great progressBNew technology is used in the space stationCDrink up
13、：space station recycles urine to waterDGood news：water recycled from urine tastes good答案C解析标题归纳题。本文报道了国际空间站的宇航员试饮尿液循环水，“Drink up”生动反映饮用时的情景，“space station recycles urine to water”点明了制造技术。故C项最佳。BDo you want to see the effects of global warming？Then head north.Will Steger is going to take all of us th
14、ere.Steger,64，the first person to make a dogsled trip to the North Pole，is a very famous and admired polar explorer.Hes at home in frozen parts of the world where few humans ever step on.Steger is also a devoted environmentalist who was early to ring the alarm bell on global warming.He saw its effec
15、ts firsthand in frequent polar expeditions to the Arctic and Antarctica.Now Steger is about to lead a team of six young adventurers on a 1,400mile,60daylong dogsled trip across Ellesmere Island，in the Canadian Arctic.The sea ice in that region should still be frozen.“We want to take our audience to
16、the front lines of global warming，” says Steger.The team will be uploading videos，stories and photos to the website global warming as they march along，allowing armchair adventurers and kids in classrooms to follow their progress day to day.“We can actually bring the audience up there，” Steger says.Stegers team will
