清晰的结构是DBMS具有______的一个必要条件。

课文填空。按照课文填出下列各句中缺少的词汇，每空一词。

A. In fifteen terrible seconds a large city lay in 1_____.

B. Although she didn't know the best way of getting to places, she insisted that she 2_____ the trip properly.

C. Geography also 3_____ a part in 4_____ dialects.

D. I can well remember that there was a time when a deep blue sky, the song of the birds, moonlights and

     flowers 5_____ never 6_____ 7_____ me spellbound.

E. He was 8_____ with his time, for which I was grateful.

F. He was the first man 9_____ land on the moon in July 1969.

G. A great person is someone who 10_____ his life to helping others.

通货膨胀对收入和财富具有再分配效应，一般意义上讲，通货膨胀的最大收益者是（）。

A.固定收入者

B.非固定收入者

C.企业家

D.政府

市场营销核心概念包含( )等要素。

A．需要、欲望与需求

B．营销主体

C．价值与满意

D．市场

E．交换和交易

《招标投标法>规定的招标采购方式包括( )

A．竞争性招标

B．邀请招标

C．自行招标

D．公开招标

E．委托招标

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