Forhundredsofyearshumanshavedreamedoffindinglifeondistantplanets.Nowthehopeofdiscoveringrealevidenceoflifehasgreatlyincreased.NASA'sMarsdetector（探测器）Opportunitysucceededinfindingsignsthatwateronc

Question

For hundreds of years humans have dreamed of finding life on distant planets.Now the hope of discovering real evidence of life has greatly increased.

NASA's Mars detector（探测器） Opportunity succeeded in finding signs that water once existed on the planet.Opportunity landed on Mars in January.Scientists now believe that the planet could once have supported life.

This discovery was chosen by ?Science? one of the world's leading magazines as the most important scientific achievement of 2004 last Friday.

“This little wheeled one-armed box went around another planet and has done something no human has ever managed ” according to ?Science?.“It has discovered another place in the universe where life could once have existed.

“Although we still can't say that life could have existed in this environment it is now certain that there was water on Mars ”said Steve Squyres one of the scientists working on the Mars mission.The evidence comes from pictures and chemical readings taken by Opportunity.It includes marks on rocks like those caused by following water on Earth and salty chemicals like those found in dried-out sea-beds.Scientists said the new evidence proved beyond doubt that water has existed on Mars.But it is still unknown whether the water was like an ocean or just ice.

While Opportunity has not found any signs of life the presence of water means life is possible.“In everything we know about life on Earth there is no example without liquid water ” Squyres said.“So water is important for the search for life on Mars.”

Researchers agree that a future mission（任务） should bring back physical samples（样品）.But some scientists worry about the risk that this could introduce dangerous foreign creatures to Earth.“The problem here is how to get the samples back ”Squyres replied.“I think it is our responsibility to limit any risk.”

What proved that water existed on Mars?

A.The physical samples with salty chemicals.

B.The marks on rocks and salty chemicals.

C.Scientific achievements of 2004.

D.Creatures from Mars.

Which of the following is true according to the text?

A.It is now certain that there was water on Mars.

B.The water on Mars was like an ocean.

C.Evidence of life on Mars has been found.

D.Search for life on Mars is a great risk to humans.

How did scientists draw the conclusion that there was water on Mars?

A.The world's leading magazine has announced the fact.

B.Scientists have taken many pictures and chemical readings on the Mars.

C.Astronauts have got some rocks from Mars.

D.Scientists have made a study of the pictures and readings sent back by Mars detector.

It can be inferred that if the creatures from Mars came to earth _________.

A.they would be kind to humans

B.they would be cruel to humans

C.they would be a great danger to Earth

D.it would be hard to say whether it would be good news or bad news

For hundreds of years humans have dreamed of finding life on distant planets.Now the hope of discovering real evidence of life has greatly increased.

NASA's Mars detector（探测器） Opportunity succeeded in finding signs that water once existed on the planet.Opportunity landed on Mars in January.Scientists now believe that the planet could once have supported life.

This discovery was chosen by ?Science? one of the world's leading magazines as the most important scientific achievement of 2004 last Friday.

“This little wheeled one-armed box went around another planet and has done something no human has ever managed ” according to ?Science?.“It has discovered another place in the universe where life could once have existed.

“Although we still can't say that life could have existed in this environment it is now certain that there was water on Mars ”said Steve Squyres one of the scientists working on the Mars mission.The evidence comes from pictures and chemical readings taken by Opportunity.It includes marks on rocks like those caused by following water on Earth and salty chemicals like those found in dried-out sea-beds.Scientists said the new evidence proved beyond doubt that water has existed on Mars.But it is still unknown whether the water was like an ocean or just ice.

While Opportunity has not found any signs of life the presence of water means life is possible.“In everything we know about life on Earth there is no example without liquid water ” Squyres said.“So water is important for the search for life on Mars.”

Researchers agree that a future mission（任务） should bring back physical samples（样品）.But some scientists worry about the risk that this could introduce dangerous foreign creatures to Earth.“The problem here is how to get the samples back ”Squyres replied.“I think it is our responsibility to limit any risk.”

What proved that water existed on Mars?

A.The physical samples with salty chemicals.

B.The marks on rocks and salty chemicals.

C.Scientific achievements of 2004.

D.Creatures from Mars.

Which of the following is true according to the text?

A.It is now certain that there was water on Mars.

B.The water on Mars was like an ocean.

C.Evidence of life on Mars has been found.

D.Search for life on Mars is a great risk to humans.

How did scientists draw the conclusion that there was water on Mars?

A.The world's leading magazine has announced the fact.

B.Scientists have taken many pictures and chemical readings on the Mars.

C.Astronauts have got some rocks from Mars.

D.Scientists have made a study of the pictures and readings sent back by Mars detector.

It can be inferred that if the creatures from Mars came to earth _________.

A.they would be kind to humans

B.they would be cruel to humans

C.they would be a great danger to Earth

D.it would be hard to say whether it would be good news or bad news

For hundreds of years humans have dreamed of finding life on distant planets.Now the hope of discovering real evidence of life has greatly increased.

NASA's Mars detector（探测器） Opportunity succeeded in finding signs that water once existed on the planet.Opportunity landed on Mars in January.Scientists now believe that the planet could once have supported life.

This discovery was chosen by ?Science? one of the world's leading magazines as the most important scientific achievement of 2004 last Friday.

“This little wheeled one-armed box went around another planet and has done something no human has ever managed ” according to ?Science?.“It has discovered another place in the universe where life could once have existed.

“Although we still can't say that life could have existed in this environment it is now certain that there was water on Mars ”said Steve Squyres one of the scientists working on the Mars mission.The evidence comes from pictures and chemical readings taken by Opportunity.It includes marks on rocks like those caused by following water on Earth and salty chemicals like those found in dried-out sea-beds.Scientists said the new evidence proved beyond doubt that water has existed on Mars.But it is still unknown whether the water was like an ocean or just ice.

While Opportunity has not found any signs of life the presence of water means life is possible.“In everything we know about life on Earth there is no example without liquid water ” Squyres said.“So water is important for the search for life on Mars.”

Researchers agree that a future mission（任务） should bring back physical samples（样品）.But some scientists worry about the risk that this could introduce dangerous foreign creatures to Earth.“The problem here is how to get the samples back ”Squyres replied.“I think it is our responsibility to limit any risk.”

What proved that water existed on Mars?

A.The physical samples with salty chemicals.

B.The marks on rocks and salty chemicals.

C.Scientific achievements of 2004.

D.Creatures from Mars.

Which of the following is true according to the text?

A.It is now certain that there was water on Mars.

B.The water on Mars was like an ocean.

C.Evidence of life on Mars has been found.

D.Search for life on Mars is a great risk to humans.

How did scientists draw the conclusion that there was water on Mars?

A.The world's leading magazine has announced the fact.

B.Scientists have taken many pictures and chemical readings on the Mars.

C.Astronauts have got some rocks from Mars.

D.Scientists have made a study of the pictures and readings sent back by Mars detector.

It can be inferred that if the creatures from Mars came to earth _________.

A.they would be kind to humans

B.they would be cruel to humans

C.they would be a great danger to Earth

D.it would be hard to say whether it would be good news or bad news

Answer 1

【小题1】B
【小题2】A
【小题3】D
【小题4】D 解析:
【小题1】细节题。从第五段第三、四行可知B项正确。
【小题2】细节判断题。从第五段第一句可知A正确 B、C、D三项与原文不符。
【小题3】细节题。从第五段可知D项正确。
【小题4】推理题。从最后一段可排除A、B、C 故D为正确选项。

【小题1】B
【小题2】A
【小题3】D
【小题4】D 解析:
【小题1】细节题。从第五段第三、四行可知B项正确。
【小题2】细节判断题。从第五段第一句可知A正确 B、C、D三项与原文不符。
【小题3】细节题。从第五段可知D项正确。
【小题4】推理题。从最后一段可排除A、B、C 故D为正确选项。