______is considered by H.L. Mencken as the true father of our national literature.

A.HL＝p; p一＞next＝HL

B.p一＞next＝HL；HL＝p

C.p一＞next＝Hl；p＝HL；

D.p一＞next＝HL一＞next;HL＝p

A.HL = p; p-＞next = HL;

B.p-＞next = HL; HL = p;

C.p-＞next = HL; p = HL;

D.p-＞next = HL-＞next; HL-＞next = p;

A.PH，HL，CN

B.HL，PH，CN

C.PH，CN，HL

D.HL，CN，PH

A.p-＞next=HL-＞next; HL-＞next=p;

B.p-＞next=HL; HL=p;

C.p-＞next=HL; p=HL;

D.HL=p; p-＞next=HL;

A.HL=p; p->next=HL;

B.p->next=HL->next; HL->next=p;

C.p->next=HL; p=HL;

D.p->next=HL; HL=p;

A.HL = p; p-＞next = HL;

B.p-＞next = HL; HL = p;

C.p-＞next = HL; p = HL;

D.p-＞next = HL-＞next; HL-＞next = p;

A.40~50dB HL;

B.45~55dB HL;

C.50~60dB HL;

D.50~70dB HL;

E.55~65dB HL。