若定义int a=7,b=9,*p1,*p2;下列四组赋值语句中,正确的一组是()
A.p2=&a;p1=&b;*&a=*p1*a;
B.pl=&a;p2=*&pl;a=&*p2;
C.pl=&b;p2=&pl;*pl=*p2;
D.p2=*&a;pl=*&b;
正确答案是A
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