【填空题】
A、f<sub>rsub>ρ<sub>ssub>gL B、f<sub>ρsub>Lρg C、(f<sub>ρsub>-f<sub>rsub>)Lρg D、f<sub>rsub>(ρ<sub>ssub>-ρ)
A、s->next=r;r=s; B、r->next=s;r=s; C、s->next=f;f=s; D、f->next=s;f=s;
A、R=3;C=2;f=0 B、R=4;C=1;f=-1 C、R=1;C=4;f=2 D、R=2;C=3;f=1