Next Stop: Planet Mars
Fly me to the moon? That’s not far enough. On September 14, 2011, NASA released designs for a superrocket, the Space Launch System (SLS). This time the final destination will be Mars.
The SLS is a huge, liquid-fuelled rocket. If it is fully developed, it will be the most powerful rocket ever built. Its lift capability will be much bigger than that of the space shuttle of Saturn 5, the rocket that sent the Apollo missions to the moon.
NASA is planning to launch its first unmanned test flight in 2017. It is hoped that the first crew will fly in 2021 and astronauts will make it to a nearby asteroid(小行星) in 2025. NASA hopes to send the rocket and astronauts to Mars from the asteroid by the 2030s, according to the Associated Press (AP).
NASA used liquid rockets to send Apollo, Gemini and Mercury into space, but later changed to solid rockets boosters(助推火箭) because they were cheaper. Tragically, however, a booster flaw(缺陷) caused the space shuttle Challenger to crash in 1986. The new project plans to return to liquid fuel.
According to AP, the rockets will at first be able to carry 77 to 110 tons of payload(凈載重量). Eventually they will be able to carry 143 tons into space, maybe even as many as 165 tons, NASA officials said. By comparison, the Saturn 5 booster could lift 130 tons and the space shuttle just 27 tons.
However, unlike reusable shuttles, these powerful rockets are mostly one use only. New ones have to be built for every launch. This will be very costly.
NASA estimates that it will cost about $3 billion (19 billion yuan) per year, or $18 billion until the first test flight in 2017. NASA hopes to make money by allowing private companies to send astronauts to the International Space Station like giant taxi services, so that the program can be “sustainable”.
“This is perhaps the biggest thing for space exploration in decades,” said Senator Bill Nelson, a former astronaut. “The goal is to fly humans safely beyond low-Earth orbit(軌道) and deep into outer space where we cannot only survive, but one day also live.”
小題1:What is the outstanding feature of the SLS?
A．It’s equipped with an advanced control system.
B．It’s the first unmanned space shuttle in the world.
C．It’s the only vehicle that can fly astronauts to the moon.
D．It can send a lot more goods and passengers into space.
小題2:What is Saturn 5?
A．An aircraft that had a deadly flaw and crashed in 1986.
B．A series of rockets that once sent astronauts to the moon.
C．An unmanned space shuttle that was once famous in the world.
D．A kind of launch vehicle that will be used to carry astronauts to Mars.
小題3:NASA plans to use liquid fuel in the new project because ______ than solid rockets boosters.
A．it is less costly
B．it is much safer
C．it can last longer
D．it is more environmentally friendly
小題4:According to NASA’s schedule, it will take ______ years to fully complete the SLS program.
A．a(chǎn)bout 6B．a(chǎn)bout 10
C．less than 14 D．more than 19
小題5:It can be inferred from the passage that ______.
A．the SLS program is planning to make reusable rockets
B．the goal of the SLS program is to enable humans to live on the moon
C．the US government may not have provided enough money for the SLS program
D．NASA will use SLS as a space taxi between the Earth and Mars

小題1:D
小題2:B
小題3:B
小題4:D
小題5:C

試題分析：本文介紹了美國(guó)國(guó)家航空航天局發(fā)布的設(shè)計(jì)一個(gè)超級(jí)火箭（SLS），其目的地是火星。目標(biāo)是使人類在低地軌道安全飛行，深到外層空間，在那我們不僅僅只是幸存，但是有一天還在那生活。
小題1:從第二段Its lift capability will be much bigger than that of the space shuttle of Saturn 5及第五段the rockets ... Eventually they will be able to carry 143 tons into space, maybe even as many as 165 tons,By comparison, the Saturn 5 booster could lift 130 tons and the space shuttle just 27 tons可以推斷SLS的最顯著特點(diǎn)是容量大，故選D
小題2:從第二段句子the space shuttle of Saturn 5, the rocket that sent the Apollo missions to the moon可以得知選B
小題3:從第四段Tragically, however, a booster flaw(缺陷) caused the space shuttle Challenger to crash in 1986可以得知固體火箭助推器不夠安全，所以改用液態(tài)燃料。
小題4:從第三段NASA is planning to launch its first unmanned test flight in 2017... send the rocket and astronauts to Mars from the asteroid by the 2030s,簡(jiǎn)單的計(jì)算一下可得知大約10年。
小題5:從最后一段NASA hopes to make money by allowing private companies to send astronauts to the International Space Station like giant taxi services, so that the program can be “sustainable”暗示美國(guó)政府可能沒(méi)有提供足夠多的錢給 SLS項(xiàng)目。另外，A答案文章中未提及，B答案是文章中的直接信息，不能入選。D答案是錯(cuò)誤表述。
點(diǎn)評(píng)：本文介紹了美國(guó)國(guó)家航空航天局發(fā)布的設(shè)計(jì)一個(gè)超級(jí)火箭（SLS），其目的地是火星。科普類說(shuō)明文因?yàn)榕c學(xué)生日常生活距離較遠(yuǎn)，專業(yè)詞匯比較多，給考生造成一定的困擾。因此，在平時(shí)備考過(guò)程中應(yīng)該多加強(qiáng)練習(xí)，增強(qiáng)對(duì)科普類的感知能力和應(yīng)試技巧。
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