先用你喜欢的方式表示出思考的过程（可以用文字表示也可以画图表示），再列式解答．

我是这么想的：

列式解答：

用方框中所给单词的适当形式填空，使短文正确、通顺，每次限用一次：

    Everyone is talking about Bird Flu. Yes, it is a very ____ disease. It could make people sick. It will be a few months still before we have good____ for Bird Flu. In order to(为了) ____ Bird Flu, we shouldn’t touch sick chickens or their droppings(粪便). So it is a good idea for people to keep ____  from live chickens. But if you do touch an ill bird, remember to wash your hands carefully with soap(肥皂)____ away. Also, don't forget to open your windows often and ____ regularly(正常地). Getting ____ sleep is also very important for fighting ____ . Try to keep away from people who have the ____ , and always cover your mouth and nose when you  ____ or sneeze(打喷嚏).

依次填入下列各句横线上的词语，恰当的一组是（    ）

①地质工作是地下情况的调查研究工作，往往在短时间内不能产生经济效益，容易被有些领导________。

②凡星期天参加本系统歌咏比赛的同志________调休一天。

③混凝土搅拌机和空气压缩机的吼声________山谷。

假如地球失去引力，下列设想错误的是    （   ）