A. Humans cannot survive on Mars. B. Humans may bring new diseases to Mars. C. The exploration may destroy Mars' ecosystem. D. Technology challenges will make mining on Mars hard. (3) What's the author's suggestion for future space exploring? ___ A. Making relevant laws properly...
Many people would f 59 i11.Humans cannot survive (活下来) without water, oxygen or f_60_. So far, nobody knows whetherthere would be enough water or oxygen on Mars for people there. Moreover scientists are not sure whether plantscould g_61_ on Mars. Food would most probably be in ...
一、阅读理解Some people believe that humans could live on Mars by the year 2100. Our own planet, theEarth, is becoming more and more crowded and polluted because of the rapid increase inpopulation. 1.Here is what life there could be like.At present, our spacecrafts are too slow to carry...
Humans cannot survive 7 water, oxygen (氧气) or food. Nobody 8 (know) whether there would be enough water or oxygen on Mars for people there. Gravity could be another problem. The gravity (重力) on Mars 9 (be) only about three-eighths (八分之三) of that on the Earth (地球). ...
Later it could be for people who live there. However, it's a pity that the sheets are being studied in the lab."【小题1】The scientists made sheets ___.A.to change the weather of MarsB.to grow food on MarsC.to get materials on the groundD.to let people live on Mars【小题2】...
Some people believe that humans could live on the planet Mars by the year 2100. Our own planet, the Earth, is becoming more and more crowded and polluted because of the rapid increase in population. It is hoped that people could start all over again and build a better world on Mars. He...
Could lichens survive on Mars?Richard Armstrong
Life on Mars Some people believe humans could live on the planet Mars by the year 2100. Our own planet, the Earth, is becoming more and more crowded and polluted because of the rapid increase in population. 【小题1】(hopeful), people could start all over again and build 【小题2】 bett...
However, the spaceship would travel so fast that the journeyto Mars might be quite uncomfortable. Manypeople would f【小题4】 ill.Humans cannot survive(活下来) without water, orygen or f【小题5】. So far, nobody knows whether there would be enough water or oxygen on Mars for people ...
a class of chemicalsonce widely usedin aerosols and refrigerants that have beenharmfulto our home planet’sozone. But while they might be effective at raising the temperature of Mars, the Red Planet’s surface doesn’t have many chlorofluorocarbons. So, to execute...