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職稱英語理工類閱讀判斷真題訓(xùn)練
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職稱英語理工類閱讀判斷真題訓(xùn)練 1
So Many "Earths"
The Milky Way (銀行) contains billions of Earth-sized planets that could support life. Thats the finding of new study. It draws on data that came from NASAs top planet-hunting telescope.
A mechanical failure recently put that Kepter space telescope out of service. Kepler had played a big role in creating a census of planets orbiting some 170,000 stars. Its date have been helping astronomers predict how common planets are in our galaxy. The telescope focused on hunting planets that might have conditions similar to those on Earth.
The authors of a study published in The Proceedings of the National Academy of Sciences conclude that between 14 and 30 out of every 100 stars with a mass and temperature similar to the Sun may host a planet that could support life as we know it. Such a planet would have a diameter at least as large as Earths but no more than twice that big. The planet also would have to orbit in a stars habitable zone. Thats where the surface temperature would allow any water to exist as liquid.
The new estimate of how many planets might fit these conditions comes from studying more that 42,000 stars and identifying suitable worlds orbiting them. The scientists used those numbers to extrapolate (推算) to the rest of the stars that the telescope could not see.
The estimate is rough, the authors admit. If applied to the solar system, it would define as habitable a zone starting as close ot the Sun as Venus and running to as far away as Mars. Neither planet is Earthlike (although either might have been in the distant pase). Using tighter limits the researchers estimate the between 4 and 8 out of every 100 sunlike stars could host an Earth-sized world. These are ones that would take 200 to 400 days to complete a yearly orbit.
Four out of every 100 sunlike stars doesnt sound like a big number. It would mean however that the Milky Way could host more than a billion Earth-sized planets with a chance for life.
16. The Kepler space telescope has been in service for 15 years.
A. Right
B. Wrong
C. Not mentioned
17. The main task of the Kepler space telescope is to find out planets with similar conditions to Earths.
A. Right
B. Wrong
C. Not mentioned
18. The planet that could support life might be a little bit smaller than Earth.
A. Right
B. Wrong
C. Not mentioned
19. The Earth is a planet orbiting in the Suns habitable zone.
A. Right
B. Wrong
C. Not mentioned
20. The new finding is based on a thorough study of 170,000 stars on the Milky Way.
A. Right
B. Wrong
C. Not mentioned
21. The estimate of the number of planets that could support life is not very accurate.
A. Right
B. Wrong
C. Not mentioned
22. This is the first research finding about the planets with a chance for life.
A. Right
B. Wrong
C. Not mentioned
職稱英語理工類閱讀判斷真題訓(xùn)練 2
The Theory of Everyone
If Stephen Hawking lives until the year2017, he will have lived more than 50 years longer than his doctors expected. When he was a college student, doctors discovered that he had a rare disease. This disease causes a gradual disintegration(分解)of the nerve cells in the brain cells that regulate voluntary muscle activity. Death almost always occurs within two or three years.
Today Stephen Hawking cannot walk or speak. He cannot move his arms or his head. He cannot taste or smell anything. And yet this man is Professor of Mathematics at Cambridge University, a position held by the famous scientist Isaac Newton in 1669.
Hawking is often described as the greatest scientist since Albert Einstein, but to the world outside science, he is also known as the man who made scientific theory understandable. His book, A Brief History of Time, has sold over eight million copies.
He says that since he does not have to think about his body or do any of the things other men have to worry about, such as washing the car or working in the yard, he can dedicate all of his time to thinking. This puts him in the perfect position to find the answer to the question that he has dedicated his life to. His question is: Is therea complete theory of the universe and everything in it?
Despite his tremendous physical disabilities, he has already made some very important discoveries about the origin of the universe, how the universe holds together, and how it will probablyend. He has also been able to explain the secrets of “black holes” in space. Now he is looking for a set of rules that everything in our universe must obey. He calls it the Theory of Everything. He thinks that someone will have found the answer within the next 20 years.
If Stephen Hawking is able to find his Theory of Everything, he will have given the world the opportunity to understand things that will change the whole nature of sciencee and probably also the way we live.
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