A. select *from user where A=1 and B=1
B. select *from user where 1=1 and A=1 and B=1
C. select *from user where B=1 and C=1
D. select *from user where A=1 and C=1
在x86系統(tǒng)下,sizeof如下結(jié)構(gòu)體的值是多少()。

A.20
B.22
C.24
D.26