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题型:阅读理解-阅读单选 难度:0.65 引用次数:84 题号:16169767

If Mars were the popular kid in school, Venus (金星) would be the unwelcome one sitting in the corner, largely ignored. Venus has nearly the same mass and size as Earth, but being closer to the sun, it gets nearly twice as much heat from the sun.

However, instead of having a climate that is just a warmer version of Earth’s, Venus’s surface and atmosphere are unbearable: clouds of sulphuric acid (硫酸) blanket the planet, while at ground level, it is hot enough to melt lead. Despite this, there is now a sign that Venus may harbour life. Jane Greaves at Cardiff University, UK, and her colleagues recently detected (发现) phosphine (磷化氢) in Venus’s atmosphere, with one potential explanation that it is the by-product of biology. That is because the only way this gas is made on Earth is in laboratories or by microbes (微生物). Though this doesn’t mean it was produced by life on Venus, attempts to find non-biological explanations for its presence have so far failed. Our best way of confirming or rejecting the possibility of life on Venus is to go and have a proper look. While Mars has been the focus of interplanetary (行星间的) exploration efforts lately, the phosphine discovery lets people look at Venus in a new light. As NASA administrator Jim Bridenstine tweeted: “It’s time to prioritize Venus.”

In the months and years to come, computer simulations(模拟) will be used to further study the possible chemistries of the atmosphere on Venus. More laboratory experiments will be conducted to try to identify other ways the phosphine there could be produced. However, there is no guarantee that these efforts will reveal the true nature of this substance on Venus. A newly-proposed strategy is to directly sample the atmosphere and surface of Venus. By doing so, we would be able to take direct measurements of phosphine.

The discovery of phosphine in Venus’s atmosphere is a great accomplishment. The scientific efforts may be just what we need to finally refocus on this neglected world. Possibly, the quiet kid in the corner may get the last laugh

1. Which description about Venus is NOT true?
A.It has the unbearable surface and atmosphere.
B.It has nearly the same mass as Earth.
C.It is almost as large as Earth.
D.It has a warmer Earth-like climate.
2. What can the discovery of phosphine on Venus indicate?
A.This kind of gas is very common.B.There might exist signs of life.
C.Many products can be made with it.D.Experiments were once conducted there.
3. What is Paragraph 3 mainly about?
A.The necessity to analyse phosphine.
B.The power of computer simulations
C.The importance of observations.
D.The approaches to exploring phosphine
4. Which can best describe the author’s attitude to the exploration of Venus?
A.CasualB.Doubtful.C.Supportive.D.Unclear.

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【推荐1】Despite what so many people would love to believe, NASA hasn’t discovered any evidence of past or present intelligent life on Mars. So, when the Curiosity rover (好奇号探测器) found something suspicious on the Red Planet’s surface, they were not only surprised but also a little bit worried.

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In a new update from NASA the object has now been identified as a natural piece of rock rather than a piece of any man-made craft or vehicle. The team analyzed the bizarre object with a tool called the ChemCam RMI. The instrument uses a laser (激光器) to sniff out the makeup of anything it’s pointed at, and the results for this particular piece of debris revealed that it’s actually just a very thin piece of rock.

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How this particularly thin sliver of rock got to where it is—and why it seems to be a different colour than the surrounding sand and debris —remains unexplained, but at least the rover isn’t falling apart.

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