葡萄沟与火焰山虽然邻近，气候却凉爽得多．这主要是因为，火焰山上都是石块，葡萄沟中溪流众多，夏天，在阳光的照射下，由于水的 比石块大得多，因此在吸收相同热量后，升温较____（选填“快”或“慢”）；同时，遍布沟中的绿色植物发生蒸腾作用时，也会____（选填“吸收”或“放热”）热量，使周围气温____（选填 “升高”或“降低”），所以说，沟中相对山上清爽得多．
比热容；慢；吸收；降低
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 Jack and John are two boys. They are best __1__. They go to school and play sports together. Jack works hard, __2__ he is good at his lessons. John doesn't __3__ well in maths. So Jack often helps John with __4__ maths. There __5__ thirty-two students in their class. Lessons start __6__ 9 o'clock in the morning. They have __7__ break at eleven. They have lunch at school. They always eat some meat and some __8__ for lunch. About five o'clock they go home. Jack and John would like __9__ to the cinema this evening. It's Bolt (《闪电狗》) and it's their __10__ film. | ||||
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