题型:选择题 It was _____ very rare find and the scientist who made ____ discovery said it was almost unbelievable. [ ]A. a; the B. the; the C. the; a D. a; a 查看答案
题型:单项选择题 A1/A2型题 关于心脏听诊,下列叙述正确的是()A.心包叩击音出现在收缩期B.奔马律出现在收缩期C.开瓣音出现在收缩期D.第三心音出现在心室快速充盈期末E.主动脉喷射音出现在收缩中晚期 查看答案