我国第一位白话诗人是______。

A．胡适
B．鲁迅
C．郭沫若
D．矛盾

设单链表中节点的结构为(data, link) 。已知指针q所指节点是指针p所指节点的直接前驱，若在*q与*p之间插入节点*s，则应执行下列哪一个操作

A．s↑.link: =p↑.link; p↑.link: =s

B．q↑.link: =s; s↑.link: =p

C．p↑.link: =s↑.link; s↑.link: =p

D．p↑.link: =s; s↑.link: =q