7月20日托福閱讀考試真題解析-資料下載頁(yè)
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【正文】 geological timescales. It is interesting to remark that there is almost no water on Venus’s atmosphere.There are many more differences between both planets.Whereas Earth rotates in about 24 hours Venus rotates in the contrary sense (retrograde rotation) in 243 days. The orbital period of Venus is 225 days so that a Venus year takes less than a full day. The bination of these two periods results in the Sun appearing from the West and disappearing over the East with a daynight cycle of 117 days.The atmosphere of Venus is 90 times more dense than that on Earth an it is made of % of CO2 and a 3% of nitrogen. This means that both planets have the same amount of Nitrogen on their atmospheres. Surprisingly the CO2 on Earth is stored on calcite type rocks and if we would convert the CO2 on these rocks into atmospheric CO2 it would amount to the same amount of CO2 that there is on Venus’atmosphere.Because of the denser atmosphere and the chemical position Venus experiences an immense greenhouse effect that raises the temperature over the surface to more than 470.Clouds are mon on Earth but they cover pletely Venus’atmosphere. They are made of sulfuric acid droplets at 5070 km above the surface and at temperatures parable to Earth’s surface temperatures. They are extremely reflective making Venus the most reflecting body in the Solar System..加入英語(yǔ)學(xué)習(xí)交流群，分享英語(yǔ)學(xué)習(xí)心得： 雅思學(xué)習(xí)VIP交流群：208407361 托福學(xué)習(xí)VIP交流群：124024942 SAT學(xué)習(xí)VIP交流群：142976617
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