单项选择题
A.sp1=&c;sp2=sp1 B.sp1=&c;sp2=&sp1 C.sp1=&c;sp2=*sp1
A.acc,bbxxyy B.accbbxxyy,bbxxyy C.accxxyy,bbxxyy D.accxyy,bbxxyy
A.44 B.22 C.24 D.46