题目

“舞台上的云雾、人工降雨”等都可以用下列哪一项解释（      ）  A．二氧化碳气体能与水反应                    B．干冰能变成水蒸气 C．固态二氧化碳（干冰）在汽化时吸收热量       D．气体二氧化碳易液化 答案：C综合填空。（10分）根据短文内容，从方框中选择适当的单词，使短文完整、通顺，不要求改变词型。enough, kinds ,less ,healthy ,little, sick ,energy,ways ,choose ,fruit   As we know, food gives us   1   . We must have   2   food to keep us   3   . Of course, we must also have the right   4   of food. We should eat more   5  and vegetables but   6   meat. Different foods help us in different  7  . If we eat too  8  or too much food, or if we   9  the wrong food, it can make us   10  .