题目

我国是世界上严重缺水的国家之一，目前我国可利用的淡水资源总量为27500亿 ，人均占有淡水量居全世界第110位，因此我们要节约用水.27500亿这个数用科学记数法表示为（ ） A . B . C . D . 答案：CPut the words in the correct order and use the words in brackets to make sentences. Then rewrite them with to-infinitives.5 the tea/hot/is/drink it/no one/can (so ... that)6 could/she/on time/Amy/took a taxi/get to the cinema  (so… that)