_______ difficult and challenging the task may be, we must finish it on time, because there is a possibility _______our work will go down in history.

A．Whatever; that

B．However; as

C．Whatever; which

D．However; that

关于三叉神经痛以下哪项是错误的（）

A.又称痛性抽搐

B.短暂阵发性，反复发作的电击样剧痛

C.检查均可发现有器质性病变

D.局限于三叉神经分布区

E.老年女性多见