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  3. 　　We cannot see it, we barely understand it, yet we know it exists because of the powerful influence it exerts on space. Dark ma

　　We cannot see it, we barely understand it, yet we know it exists because of the powerful influence it exerts on space. Dark ma

admin2022-02-15  13
问题 　　We cannot see it, we barely understand it, yet we know it exists because of the powerful influence it exerts on space. Dark matter makes up about 27% of the universe, and its gravitational force is enough to mesh entire galaxies together in a structure known as the cosmic web. Scientists have now created the largest map to date of this mysterious substance, but they find it could imply there is something wrong with Einstein’s theory of relativity.
　　Using artificial intelligence methods to analyse images of 100M galaxies, members of the international Dark Energy Survey (DES) team—which works on revealing the nature of the dark energy driving the expansion of our universe—have created a map that covers a quarter of the southern celestial hemisphere. Visualised as pink, purple and black-mottled patches, clustered inside a pale ring, the brightest areas of the map reveal the densest areas of dark matter, corresponding to super clusters of galaxies. The black patches are cosmic voids.
　　Dr. Niall Jeffrey said: " We can really see this cosmic web structure, including these enormous structures called cosmic voids, which are very low density regions of the universe where there are very few galaxies and less matter. " Scientists are interested in these structures because they suspect that gravity could behave very differently inside them. By identifying their shapes and locations, the map could provide a starting point for further study.
　　According to the standard model of cosmology, the universe started with the " big bang" then expanded. Although calculations by the DES team suggest the distribution of this matter is broadly consistent with the predictions in the standard model, it is not a perfect fit. " If you look out into the universe, the matter isn’t as clumpy as expected, there are hints that are smoother," said Jeffrey. " It may seem a relatively small thing, but if these hints are true then it may mean there’s something wrong with Einstein’s theory of general relativity, one of the great pillars of physics. " One possibility is that some of the measurements that have been used to calculate how the universe should look are not correct. Alternatively, it could be a problem with the underlying model.
　　Ofer, a co-author of the study, was not prepared to go that far but added; "What I say is, look, don’t be too relaxed. There’s something there which might indicate a disparity. Work hard, try to understand it by conventional means, but keep your eyes open that it could lead to a revolution in physics. "
It can be inferred from Paragraph 3 and 4 that_________.
选项 A、There is less normal matter but more dark matter in cosmic voids
B、The map is the starting point of the theory of general relativity
C、The calculations can barely fit the standard model
D、The reason why the distribution is imperfect is non-deterministic
答案D
解析 推断题。根据出题顺序原则，选项A可定位至第三段第一句，原文中仅提到宇宙空洞有着更少的物质，并没有提到有更多的暗物质，过度揣测，故排除；根据选项B可定位至第三段第三句，文中提到地图可以为进一步研究提供一个起点，并没有说是广义相对论的起点，偷换概念，故排除；根据选项C可定位至第四段第二句，其中barely“几乎不”与文中broadly consistent“大体上一致”相悖，故排除；根据选项D可定位至第四段，有两种原因导致物质的分布不能完美匹配标准模型：一是测量结果不正确，二是底层模型的问题，故这个原因是不确定的，选项D正确。
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