Xinjiang is one of the areas        sandstorms happen most often,        results from a dry climate, vast desert and a strong wind.

A．where; which

B．when; that

C．where, that

D．that; which

下述有关耵聍栓塞与外耳道胆脂瘤的治疗哪项有误（）

A.栓塞之耵聍可用耵聍钩钩出

B.并发外耳道炎应予相应的抗炎处理

C.并发外耳道炎应尽早取出

D.难于取出的耵聍可在5%碳酸氢钠液滴耳后冲洗

E.难于取出的外耳道胆脂瘤可在5%碳酸氢钠滴耳后冲洗