Why was the marriage tent made larger and larger?
A. because the celebration increases in size
B. to chase jealous jinns further and further away
C. to show the progress of the couple's relationship
D. so Assalama's friend, mother, and helper could enter.
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xsb表中有总学分这个字段。现在要查找xsb表中总学分大于50的同学情况。查询语句如下,补充完整select * from xsb where
查询成绩表中成绩大于等于85并且小于等于90的记录,补充程序。select * from 成绩表 where 成绩 and 成绩<=90
当需要判定一个表达式的值是否为空值时,要用 (填写内容中字母小写)关键字。
组成机器的最小单元为()。
A. 零件
B. 组件
C. 部件
D. 合件