题目

下列事例中不是利用大气压工作的是 （ ）A. 用塑料吸管吸饮料 B. 用抽水机抽水C. 用注射器将药液注入病人体内 D. 钢笔吸墨水 答案：【答案】C【解析】解：A、用吸管吸饮料时，吸管内的气压小于外界大气压，饮料在外界大气压的作用下，被压入口腔内。利用了大气压。故A不合题意；B、抽水机抽水，通过活塞上移或叶轮转动使抽水机内水面上方的气压减小，水在外界大气压的作用下，被压上来，利用了大气压，故B不合题意。C、用 阅读表达阅读短文，根据要求完成下面各小题Many people in the United States celebrate Christmas Day on December 25. The day celebrates Jesus Christ’s (耶稣）birth.Christmas Day is just like our Spring Festival.People celebrate Christmas Day in many ways. In the days or even weeks before Christmas Day, many people put up Christmas trees in their homes, put lights and gifts in the Christmas trees, exchange gifts with family and friends, and eat a special meal, such as turkey(火鸡）and a lot of other festival foods. Children often get a lot of gifts,which are put on Christmas trees . Shops are red and green. There are so many Christmas cards,Christmas hats, Christmas toys and many colorful things. So shops looks very beautiful. We can give a card or a toy to our friends: A lot of families spending lots of money on gifts and food.Christmas is coming, and it also means a new year will come. Let’s study harder to welcome the new year!(一）根据短文内容简要回答以下问题。1.What can you see in Christmas trees on Christmas Day?___________________________________________________________________2.Why do the shop look very beautiful on Christmas Day?____________________________________________________________________（二）将短文中环线的两个句子译成汉语。3.__________________________________________________________________4.__________________________________________________________________（三）请给短文拟一个合适的英文标题。5.__________________________________________________________________