Question

【題目】For centuries, humans have wondered whether there is life on Mars. Why is Mars losing its air? Last week, the question was answered.

“The answer, is blowing in the wind,” said Michael Meyer. He is the lead scientist for Mars Exploration Program.

It turns out solar winds from the sun are slowly stripping( 除掉) away Mars' air. That is what scientists explained at a press conference.

Bruce Jakosky is the principal investigator on the MAVEN team. It is a spacecraft that collects information from Mars as it circles around the planet.

Today, Mars has a thin atmosphere. It is cold and dry. ______

"When we look at ancient Mars, we see a different type of surface. One that had valleys that looked like they were carved by water, lakes that were standing for a long period of time. We see an environment that was much more able to support liquid water."

Recently scientists found a kind of liquid water that flows with salt down a mountain area of the planet. But, it is not always there. Scientists already knew that ice exists on Mars. So why is it important to find liquid water?

"It means that we have a resource. And when we're looking at sending humans to Mars, water is one of the key things that we need to have. Not only for the astronauts to drink, but also to make oxygen and fuel."

Sending humans to Mars will be in the 2030s. Those chosen might fly any number of space vehicles still in development.

Human beings are developing rockets and spacecraft to get people to Mars. Scientists want to know how the human body reacts to being in space for long period of time.

Whether there is life on Mars remains unanswered. But some scientists think there might be some kind of microbial life on the planet. Finding life on another planet would change the way we view the whole universe.

【1】What was the surface of ancient Mars like?

A. It had thin air.B. It was dry.

C. It had valleys that looked like they were carved by water.D. It had no water.

【2】Which statement is TRUE according to the passage?

A. The surface of the Mars is different from it used to be.

B. Scientists have known whether there is life on Mars.

C. People can not send humans to Mars forever.

D. There is not any atmosphere on Mars.

【3】What does the underlined word "Those" in the text refer to?

A. ScientistsB. RocketsC. AstronautsD. Vehicles

【4】Which of the following is the best for“______”in Paragraph 5?

A. But it used to be much different.B. It was the same case in the past.

C. It's always like this.D. It will be different in the future.

Answer 1

【答案】

【1】C

【2】A

【3】C

【4】A

【解析】

本文主要說明了幾個世紀(jì)以來人們對火星的探索歷程。

【1】細(xì)節(jié)理解題。根據(jù)"When we look at ancient Mars, we see a different type of surface. One that had valleys that looked like they were carved by water�！爱�(dāng)我們看到古火星時，我們看到的是不同類型的表面。一個山谷，看起來像是由水雕刻而成的，有著很長一段時間的湖泊。結(jié)合選項故選C。

【2】細(xì)節(jié)理解題。根據(jù)Today, Mars has a thin atmosphere. It is cold and dry. 以及"When we look at ancient Mars, we see a different type of surface.可知現(xiàn)在的火星表面和過去是不同的，故A正確。根據(jù)Whether there is life on Mars remains unanswered.可知我們?nèi)匀徊恢�道火星上是否有生命，�?/span>B錯誤；根據(jù)Human beings are developing rockets and spacecraft to get people to Mars. 人類正在研制火箭和宇宙飛船，把人們帶到火星上。所以有一天人類是有可能去火星的，故C錯誤；根據(jù)第一段Today, Mars has a thin atmosphere. It is cold and dry.可知火星上是有大氣層的，又冷又干燥，故D錯誤。故選A。

【3】詞義猜測題。根據(jù)Sending humans to Mars will be in the 2030s. Those chosen might fly any number of space vehicles still in development. 可知這里的those指的是被選中駕駛宇宙飛船的人，即宇航員，故選C。

【4】根據(jù)橫線前后的句子Today, Mars has a thin atmosphere. It is cold and dry.說的是火星現(xiàn)在的表面，而后文說"When we look at ancient Mars, we see a different type of surface.可知過去火星的表面和現(xiàn)在是不同的，所以此處是對上文的轉(zhuǎn)折。故選A。