题型:选择题 Both of his parents died of illness so he ______ support his family at the age of 14.[ ]A. must B. should C. could D. had to 查看答案
题型:单项选择题 (病例串型最佳选择题,2-3个题共用题干) 女性,40岁,间歇性四肢乏力4年,测血压160/ 95mmHg,血钾3mmol/L,血浆肾素水平明显降低,可能的诊断A.原发性高血压B.嗜铬细胞瘤C.肾小球肾炎D.原发性醛固酮增多症E.肾盂肾炎 查看答案