Question

    Plenty of science fiction (sci-f) movies over the decades have shown us different versions of Mars. The truth about the Martian surface might be exciting because it's real. And with NASA' s Mars 2020 mission set to launch this summer, we're facing more discovery.

So far, thanks to a decade of research enabled by NASA's Curiosity rover, we've learned that lakes, rivers streams and likely oceans used to appear on Mars. While its water disappeared over three billion years ago, it tells us that Mars used to be habitable. This knowledge confuses us because so far, we've seen no clear evidence of life there, not even a virus. But if Mars was once habitable, wouldn't it have life?

NASA is now prepared to take the next step to answer this question with the launch of another rover, Perseverance. Every time a rover goes to Mars, it just stays there, with no way to fly back home. So we have never brought rock or soil samples back from Mars.

Perseverance rover will change this. Its primary and unique purpose is to collect samples that a future spacecraft can return to Earth. These samples will tell us more about the geologic history of Mars than anything we've learned, which is already a lot. Since 2012. the Curiosity rover has traveled more than a dozen miles, making observations along the way with its 10 instruments.

Thanks to data from the Curiosity rovers Sample Analysis at Mars instrument, we know that Mars does indeed have organic materials. That’s more complex than we expected to find on the surface of Mars. And that's exactly why we want to gather the most interesting samples and bring them back to Earth. We expect to find out much more about Mars once we get samples back from the Mars 2020 mission.

1.What is the purpose of Mars 2020 Mission?

A.To explore the Martian surface. B.To travel around the universe.

C.To show the power of NASA. D.To study the life on Mars.

2.What does the underlined word "habitable" in Paragraph 2 probably mean?

A.Enjoyable to visit. B.Suitable for living.

C.Ready for changes. D.Convenient to travel.

3.What was the problem with Mars exploration before Perseverance?

A.The rovers could not reach Mars.

B.Observations were hard to make.

C.Samples on Mars couldn't be brought back.

D.Study instruments got lost in the space station.

4.Which of the following can be the best title of the text?

A.New Mars rover to be launched B.Sei-fi movies on Mars to be made

C.Curiosity to bring back Mars samples D.NASA to send manned rover to Mars

Answer

1.A

2.B

3.C

4.A

【解析】

本文为说明文。本文介绍了人类对火星的研究，随着NASA的火星2020计划在今年夏天启动，我们将会有更多的发现。

1.

推理判断题。根据第一段The truth about the Martian surface might be exiting because it's real. And with NASA' s Mars 2020 mission set to launch this summer, we're facing more discovery.( 关于火星表面的真相可能令人激动，因为它是真实的。随着NASA的火星2020计划在今年夏天启动，我们将面临更多的发现。)可知，火星2020任务的目的是探索火星表面。故选A。

2.

词义猜测题。根据第二段So far, thanks to a decade of research enabled by NASA's Curiosity rover, we've learned that lakes, rivers streams and likely oceans used to appear on Mars(到目前为止，多亏了美国宇航局的“好奇号”漫游者长达十年的研究，我们了解到火星上曾经出现过湖泊、河流和海洋)可知，火星上曾经出现过湖泊、河流和海洋，这些事实告诉我们，火星曾经是“宜居的”。可推知，habitable意为suitable for living，故选B。

3.

细节理解题。根据第三段Every time a rover goes to Mars, it just stays there, with no way to fly back home. So we have never brought rock or soil samples back from Mars(每次一个漫游者去火星，它只是呆在那里，没有办法飞回家。所以我们从来没有从火星带回过岩石或土壤样本。).和第四段Perseverance rover will change this(Perseverance 探测器会改变这一点)可知，在Perseverance 探测器发射之前，火星上的样本无法带回，故选C。

4.

主旨大意题。本文开头以几十年来科幻电影中的不同版本的火星为引子，介绍了人们对火星的好奇，根据第一段最后一句And with NASA' s Mars 2020 mission set to launch this summer, we're facing more discovery(随着NASA的火星2020计划在今年夏天启动，我们将面临更多的发现。)和第三段第一句NASA is now prepared to take the next step to answer this question with the launch of another rover, Perseverance(美国宇航局现在准备通过发射另一个Perseverance探测器来回答这个问题。)可知，本文主要介绍了人类对火星的研究，随着新的探测器的发射，我们将会有更多的发现。故选A。