Question

　　The plan: turn Mars into a blue world with streams and green fields, and then fill it with creatures (生物) from the earth. This idea may sound like something from a science fiction (科幻小說), but it is actually being taken seriously by many researchers.

　　This suggested future for the “red planet” will be the main topic for discussion at an international conference hosted by NASA (美國宇航局) this week. Leading researchers as well as science fiction writers will attend the event. It comes as NASA is preparing a multi?billion?dollar Mars research programme. “Turning Mars into a little earth has long been a topic in science fiction,”said Dr Michael Meyer, NASA’s senior scientist for astrobiology (太空生物學). “Now, with scientists exploring the reality, we can ask what are the real possibilities of changing Mars.”

  Most scientists agree that Mars could be turned into a little earth, although much time and money would be needed to achieve this goal.

　　But many experts are shocked by the idea. “We are destroying our own world at an unbelievable speed and now we are talking about ruining another planet,” said Paul Murdin, of the Institute of Astronomy, Cambridge, UK. Over the past months, scientists have become increasingly confident they will find Martian life forms. Europe and America’s robot explorers have found proof that water, mixed with soil, exists in large amounts on the planet.

  In addition, two different groups of scientists announced on March 28 that they had found signs of methane (甲烷) in the Martian atmosphere (大氣). The gas is a waste product of living creatures and could be produced by microbes (微生物) living in the red planet’s soil.

　　But scientists such as Dr Lisa Pratt, a biologist at Indiana University, say that these microbes will be put in danger by the little earth project. “Before we have even discovered if there is life on Mars, we are talking about carrying out projects that would destroy all these native lifeforms, all the strange microbes that we hope to find buried in the soil,” said Dr Pratt. This view is shared by Monica Grady, a planetary scientist at the Natural History Museum, London. “We cannot risk starting a global experiment that would wipe out the precious information we are looking for.” she said， “This is just wrong.”

5. The passage is about________.

A. a plan turning Mars into a little earth

B. the necessity of changing Mars

C. Mars supporting life

D. finding water in the Mars

6. Which of the following is NOT the reason why some scientists are against the plan?

A. The project would wipe out all the native lifeforms on the Mars.

B. The project will cost too much money and work.

C. We would ruin Mars.

D. We are destroying our own world at an unbelievable speed. 

7. We can infer from the passage that________.

A. water is a crucial factor for life

B. the project will have little effect on the native lifeforms supposed to live on the Mars

C. Monica Grady is in favour of carrying out the little earth project

D. the idea turning Mars into a little earth is nothing but a science fiction

8. Which of the following supports the conclusion of microbes living in the Mars’s soil?

A. Scientists found liquid water in the Mars.

B. Scientists found signs of methane in the Martian atmosphere.

C. Scientists found a lot of good soil on the Mars.

D. Scientists found some creatures living on the Mars.

Answer 1

5---8    ABAB  

解析:

本文是議論文，描繪了把紅色火星改造成藍色的“生命天堂”的宏偉規(guī)劃，綜述了科學家對這個火星改造工程所持的不同觀點。

5.A   主旨大意題。根據(jù)第一段第一句The plan: turn Mars into a blue world with streams and green fields, and then fill it with creatures  from the earth.可知這段短文主要講的是火星改造計劃的設想。

6.B   細節(jié)題。根據(jù)短文所述，科學家反對這個設想的理由有：“We are destroying our own world at an unbelievable speed and now we are talking about ruining another planet”, 和that would destroy all these native lifeforms。B項沒有提到。

7.A   推測題。根據(jù)scientists have become increasingly confident they will find Martian life forms. Europe and America’s robot explorers have found proof that water, mixed with soil, exists in large amounts on the planet的內(nèi)容，我們知道科學家越來越相信火星上存在生命，因為有證據(jù)表明火星土壤中存在大量的水，故可斷定水是生命存在的關鍵要素。

8．B  推理題。根據(jù)The gas（methane） is a waste product of living creatures and could be produced by microbes  living in the red planet’s soil可知，火星大氣層中存在甲烷的跡象，而甲烷是活著的動物產(chǎn)生的廢物，據(jù)此科學家推斷這可能是生活在火星上的微生物產(chǎn)生的。故可得出結(jié)論：火星上可能存在微生物，主要證據(jù)是火星在大氣層中發(fā)現(xiàn)了甲烷的跡象。