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【单选题】
在数据库表employee中查找字段empid中以两个数字开头且第三个字符是下画线“_”所有记录。以下语句正确的是( )A.
SELECT * FROM employee WHERE empid LIKE ‘[0-9][0-9]_%’
B.
SELECT * FROM employee WHERE empid LIKE ‘[0-9][0-9]_[%]’
C.
SELECT * FROM employee WHERE empid LIKE ‘[0-9]9[_]%’
D.
SELECT * FROM employee WHERE empid LIKE ‘[0-9][0-9][_]%’
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反馈参考答案：
举一反三
【简答题】Some people think that children can not ( ) the real world by computers.
【判断题】Don't cut the whole steak into small pieces at one time, except the children who can not use the knives.
A.
正确
B.
错误
【单选题】设有以下语句,试问c的二进制值是 char a=3, b=6, c; c=a^b<<2;
A.
00011011
B.
00010100
C.
00011100
D.
00011000
【单选题】Small children can not ______ the difference between right and wrong. It is our duty to teach them.
A.
appreciate
B.
enjoy
C.
acknowledge
D.
confess
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