由肾实质性因素导致的急性肾衰竭中，最常见的类型是（）
A.急性肾炎
B.急进性肾炎
C.急性肾小管坏死
D.急性间质性肾炎
E.多发性小血管炎
参考答案：C
角膜基质炎的治疗方法是（）
A.局部用糖皮质激素点眼
B.针对病因治疗，如抗病毒、抗结核
C.结膜下注射激素
D.伴有虹膜炎者，用1％阿托品点眼
E.以上全是
At night you observe a vessel ahead show three flashes of a white light. This signal indicates that the vessel ahead is（）.
A.in distress
B.approaching a bend in the channel
C.operating astern propulsion
D.intending to overtake another vessel
