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Question : My 14-year-old son is very disrespectful to my husband and me and we don't know what to do.He often gets home after dark.And we have a big argument after he comes back.Can you help us? Answer : Your son should,of course,come back before dark,not because you say so,but because it is his responsibility and because you would worry about him if he didn't come home when he promised. _________1_________ Just tell him that he has to be home on time if he want s to go out next time-and that this is his choice,not yours.A.
But don't worry ．
B.
But don't argue about it ．
C.
He wants you to react to him at the age he is today ．
D.
So boys and girls are so eager to spread their wings ．
E.
If you don't listen and consider ， he won't hear a word you say ．
F.
He is growing physically ， mentally ， emotionally and even morally ．
G.
He also needs you to encourage his dreams ， no matter how strange they are ．
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【简答题】数据库是存储在某种存储介质上的相关数据有组织的集合。在这个定义中特别要注意“相关”和“有组织”这些描述，就是说，数据库不是简单地将一些数据堆集在一起，而是把一些相互间有一定关系的数据，按一定的结构组织起来的数据集合。 数据库中的数据以不同的方式组织，即构成了不同的数据模型，常用的数据模型有关系型、层次型和网状型。
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