上接7(B)期地表反射率与降雨大气降雨,是水反复循环的结果。海水蒸发变成蒸汽传播到陆地以后,上升到天空中,遇冷变成云、再变成雨滴降落,形成河流、湖泊沼泽,其水最后又流向海洋,变成海水。水蒸汽变成雨水,是在天空中演变的结果。我们常说的天空,用科学家的话来说叫做大气圈,是 The surface reflectivity of 7 (B) period and rainfall and rainfall are the result of repeated circulation of water. After the seawater evaporates into steam and spreads to the land, it rises to the sky, and when it becomes cold, it turns into a cloud and then drops into raindrops, forming rivers and lakes and swamps. Its water finally flows to the sea and becomes seawater. Water vapor becomes rainwater, the result of evolution in the sky. We often say the sky, in the words of scientists called the atmosphere, is