The oceans on earth will _ in one billion years.中主语 The oceans on earth,谓语 will _,will 后接动词原形,in one billion years 是将来时间,结合选项词意:A项 evaporate 蒸发,消失,B项 rise 增加,提高,C项 raise提升,举起, D项 flow 流动,流淌,涌进,依次代入句中
5 billion years ago, Mars and Earth began their existence under similar conditions. During the first billion years, liquid water-in contrast to ice-was abundant on the surface of Mars. This is an indication that Mars was much warmer during that time. Mars also had a thicker atmosphere of ...
One billion years from now, Earth’s atmosphere will contain very little oxygen, making it uninhabitable for complex aerobic life. Today, oxygen makes up around 21 per cent of Earth’s atmosphere. Its oxygen-rich nature is ideal for large and complex organisms, like humans, t...
”定位至第四段倒数第二句“Even though in error, Joly's calculations clearly supported those geologists who insisted on an age for Earth far in excess of a few million years.”（尽管错了，但Joly的计算明确地支持了那些坚持认为地球的年龄远远超过几百万年的地质学家的观点。）
Attempts at Determining Earth's Age结合待插入句大意“更重要的是，CL的进化方法本质上是有限的，因为地球早在生命和进化开始之前就存在了。”
Scientists think that there has been life on earth for millions of years。 科学家认为地球上存在生命已经数百万年了。 精讲:这是一个含有that引导的宾语从句的复合句,从句中there has been是there be结构的现在完成时态。 eg: It is said that there has been the sun for about 5 billion years ....
Theearthis 4.6 billionyearsold.Wehumanshavelivedontheearthforonly 35,000 years,butduringthisperiod,wehavechangedourplanet a lotinmanyways.Somethingswehavedoneareverygoodfortheearthwhileothersarebad.TheAmazonrainforestinSouthAmerica,atsevenmillionkm2,isthelargestrainforestintheworld.Theforestisimportantforpeopl...
The Earth's continents are thought to have collided to become supercontinents and broken apart again several times in Earth's 4.5 billion year history. The most recent supercontinent was Pangaea, which began to break apart about 200 million years ago; the landmasses that comprised Pangaea eventuall...
planet a lot, and we've realised that 3.5 to 4 billion years ago Mars had the conditions that could have supported the beginnings of life. We've found, with the Curiosity rover, which has been on Mars for 7 years now and is still investigating, that the crater it touched down in, ...
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