书面表达。

     阅读下面的短文，然后按提示写一篇读后感。可适当发挥。词数：100左右。

提示：

1. 概括短文的内容要点；

2. 你认为可以采取哪些措施，从“我”开始，节约用水。

     Recently, the World Forum on Water Resources has suggested that all countries take action to

deal with the global water crisis. Millions of people worldwide currently face water shortages.

Some poor countries suffer from periodic droughts. Almost half of the population in developing

countries are suffering from diseases caused by untreated water. Poor quality water is a threat to

humans’health at any time.

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在Oracle中，（）数据字典表可以用来查看抽象数据类型的实际结构。

A.USER_TYPE_ATTRS

B.USER_TABLES

C.USER_TYPE_TABS

D.USER_TAB_COLUMNS