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【单选题】
在 VFP 中,关于查询和视图的正确描述是 。A.
查询是一个预先定义好的SQL SELECT语句文件
B.
视图是一个预先定义好的SQL SELECT语句文件
C.
查询和视图是同一种文件，只是名称不同
D.
查询和视图都是一个存储数据的表
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举一反三
【单选题】If you are worried about things and are under a lot of stress at work or school, then you are probably not sleeping well. Worry can keep you awake, tossing and【C1】______in bed until the early hours of...
A.
turning
B.
rolling
C.
twisting
D.
rotating
【简答题】If you are worried about things and are under a lot of stress at work or school, then you are probably not sleeping well. Worry can keep you awake, tossing and turning in bed until the early hours of ...
【单选题】If you are worried about things and are under a lot of stress at work or school, then you are probably not sleeping well. Worry can keep you awake, tossing and【C1】______in bed until the early hours of...
A.
turning
B.
rolling
C.
twisting
D.
rotating
【单选题】参照完整性规则包括更新规则、删除规则和插入规则,关于这些规则的相关说明中,不正确的是________。
A.
更新规则规定了当更新父表中的连接字段（主关键字）值时，如何处理相关的子表中的记录
B.
当更新规则选择为“级联”时，表示用新的连接字段值自动修改子表中的相关所有记录
C.
删除规则规定了当删除父表中的记录时，如何处理子表中相关的记录
D.
插入规则规定了当插入父表中的记录时，是否进行参照完整性检查
【单选题】If you are worried about things and are under a lot of stress at work or school, then you are probably not sleeping well. Worry can keep you awake, tossing and 【26】______ in bed until the early hours ...
A.
turning
B.
rolling
C.
twisting
D.
rotating
【单选题】If you are worried about the problem ， you should do something it ．
A.
． about
B.
． for
C.
． against
D.
． with
【简答题】If you are worried about things and are under a lot of stress at work or school, then you are probably not sleeping well. Worry can keep you awake, tossing(翻来覆去) and turning in bed until the early hou...
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