黄冈八模 2024届高三模拟测试卷(三)3英语(S)答案

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may be as common as ordinary rocks.According to new research,planets with high carbon-to-oxygen ratios could form large quantities of diamonds if those planets also contain water.The researchers behind the finding,a team from Arizona State University and theUniversity of Chicago,found that under high-heat,high-pressure conditions like those foundinside the Earth,certain planets may be making vast quantities of diamonds beneath theirsurfaces."In the universe,there are about 100 billion planets in our galaxy()and 100 billiongalaxies in the universe,"said Harrison Allen-Sutter,the study's lead author."Even ifdiamond planets are only one in a billion,the vast size of the universe means there could stillbe trillions of diamond planets in the universe.These worlds contain far more carbon than Earth.Near their cores,the planets are alsobelieved to contain liquid silicon carbide(a碳化硅)，a substance made up of silicon andcarbon.By reproducing the conditions on such a planet in the lab,the researchers confirmedthat if heat and pressure get extreme enough-and if a planet has water-silicon carbide canbe transformed into diamonds.In a lab,the researchers found out what this chemical reaction would look like on acarbon-rich planet by first putting silicon carbide in water.Then they placed samples of thematerial into a device which can compress (small bits of material using extremepressure.The scientists then superheated the samples.At the end of the process,the sampleshad indeed turned into diamonds-just as the researchers had predicted.It was confirmationthat,yes,it's possible that diamond planets exit.Diamond planets,assuming they exist,would have harsh environments:the researcherspredicted that their atmospheres would have to be rich in gases that are low in oxygen.Plus,the planets would be too hard to be geologically active-a characteristic that keepstemperatures stable.For these and other reasons,diamond planets aren't likely to supportlife.28.What do we know about diamond planets from the passage?A.Diamond planets are rich in oxygen and water.B.There are about one trillion diamond planets in the universe.C.There is much more carbon on diamond planets than on EarthD.Temperatures on diamond planets are lower than those on Earth.29.In what order did the researchers take the following steps to prove their prediction?a.Superheated the silicon carbide.b.Put the silicon carbide into water.c.Put the silicon carbide into a compressing device.d.Produced the environment of diamond planets in the lab.A.abcdB.dacbC.dbcaD.dcab30.What can we infer from the last paragraph?A.Diamond planets would be geologically active.B.There could be only a few creatures on diamond planets.C.Life on diamond planets would be similar to that on Earth.D.Temperatures on diamond planets could be very variable.英语试题（雅礼版）第5页（共10页）