在双向链表中删除指针p所指的结点(pre和next，是结点的指针域，pre指向结点的前驱，next指向结点的后继)，则需要执行( )。 A: p↑．next：=p↑．pre；p↑．pre：=p； B: p↑．next↑．pre：=p↑．pre；p↑．pre↑．next：=p； C: p↑．pre：=p↑．next；p↑．next=p↑．pre； D: p↑．pre↑．next：=p↑．next；p↑．next↑．pre：=p↑．pre；

〈center〉…〈/center〉是 标记 而〈pre〉…〈/pre〉是 标记。

中国大学MOOC: Children go to the kindergarten, then ______ to pre-school, and then school.

在循环双链表的p所指结点之后插入s结点的操作是（ ） A: p->next=s; s->pre=p; p->next->pre=s; s->next=p->next; B: p->next=s; p->next->pre=s; s->pre=p; s->next=p->next; C: s->pre=p; s->next=p->next; p->next->pre=s; p->next=s; D: s->pre=p; s->next=p->next; p->next=s; p->next->pre=s;

在循环双链表的p所指结点之后插入s结点的操作是（ ） A: p->next=s; s->pre=p; p->next->pre=s; s->next=p->next; B: p->next=s; p->next->pre=s; s->pre=p; s->next=p->next; C: s->pre=p; s->next=p->next; p->next->pre=s; p->next=s; D: s->pre=p; s->next=p->next; p->next=s; p->next->pre=s;

智慧职教: <pre>关于嗜酸性粒细胞叙述，错误的是</pre><p></p>

Children go to the kindergarten, then ______ to pre-school, and then school. A: graduate B: degrade C: retrograde D: downgrade

‏Children go to the kindergarten, then ______ to pre-school, and then school. ‏‏‏ A: graduate B: degrade C: retrograde D: downgrade

‍Children go to the kindergarten, then ______ to pre-school, and then school. ​‍​ A: graduate B: degrade C: retrograde D: downgrade

当PRE=0时意味着两变量之间无关，PRE=1时意味着两变量之间完全相关。（ ）