单项选择题
A.outfilseekp(321,ios_base::cu; B.outfilseekp(321,ios_base::bg; C.outfilseekp(-321,ios_base::be; D.outfilseekp(-321,ios_base::cu;
A.template<CLASS Q> B.template<CLASS Q> Q F(Q {retum Q+x;) Q F(Q {return x+x;} C.template<classT> D.template<class T> TF(T {return x*x;) Bool F(t{return x>1;)
A.operator-( B.operator-(y, C.operator-( D.operator-(x,