布鲁巴奇等在1994年提出的四种反思方法包括( )。 A．反思日记 B．详细描述

数据库中对全部数据的物理结构和存储方式的描述，作为数据库的

A．外模式

B．子模式

C．模式

D．存储模式

短文改错。

    I often quarrel about my mother over whether I can watch TV after school. She holds view that senior one

students have to make fully use of every minute to work hard at their lessons. It seems to me that once I am

allowed to do that. I will unable to control myself and forget all about my study. She also thinks it is bad for

my eye. But I really can not accept her ideas. In my opinion, watch TV can set my mind at rest after a day's

a hard works. Besides, it is important for us to know what had happened at home and at abroad. Thus, we

shouldn't be forbidden to watch TV.

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下面哪一项不是电子商务安全风险管理中计划步骤的一部分？（）

A.定义策略

B.识别漏洞

C.建立审查流程

D.建立突发事件反应组

书籍《菊与刀》描写的是哪个亚洲国家的文化？

多孔材料保冷的原理是靠热导率小的（）充满孔隙中实现保冷。

A、气体

B、液体

C、固体

D、胶体