【简答题】A.Land, oceans and plants can absorb the sun's rays. B.Not all the sun's energy that reaches Earth can stay there. C.It is warmer in outer space than it is on Earth. D.More energy comes in through the...
【单选题】If the sun’s rays were entirely _______, there would be dramatic changes in the climate on the earth, and the result could be disastrous to the human race. [ ]