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【单选题】
以下关于主关键字的叙述中,正确的是()A.
主关键字的内容具有唯一性,而且不能为空值
B.
同一个数据表中可以设置一个主关键字,也可以设计多个主关键字
C.
排序只能依据主关键字字段
D.
设置多个主关键字时,每个主关键字的内容可以重复,但全总主关键字的内容组合起来必须具有唯一性
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【简答题】Her name is Mary. She comes from London. She is in China with her father and mother. Shecan speak a little Chinese. She studies in No. 80 Middle School in Tianjin. She is in the sameschool as her pare...
【简答题】Mary Cassatt is one of the first great women American painters. At first her father did not want her to become an artist. But she followed her dreams and became an artist.She was born on May 22, 1844,...
【判断题】Mary I had always rejected the break with Rome instituted by her father and the establishment of Protestantism by her brother ’ s regents.
A.
正确
B.
错误
【简答题】用画线词的对应词填空。 1. Her ______ is an English teacher and her father is a Chinese teacher. 2. My sister is in Beijing and my______ is in Chengdu. 3. These are his pens and ______are pencils. 4. This is my ...
【单选题】单项选择。 Mary and her father ______ in Beijing last month. [ ]
A.
was
B.
were
C.
are
D.
is
【简答题】一名合格的推销人员应具备哪些素质?
【简答题】Mary is sitting ____ her mother and her father.
【单选题】A Her name is Mary． She comes from America． She is in China with her father and mother． She can speak a little Chinese． She studies in No． 80 Middle School in Tianjin．She is in the same school as her ...
A.
America
B.
China
C.
No． 80 Middle School
D.
Tianjin
【简答题】你觉得一名合格的推销人员应该具备哪些基本素质?
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