下列哪种方法不能矫治散光() ["A.硬性角膜接触镜","B.表面角膜镜片术","C.准分子激光角膜切削术","D.准分子激光角膜原位磨镶术","E.白内障摘除人工晶状体植入术"]
囊肿的声像图特征是() ["A.边界回声不定","B.外形不定","C.内部无回声","D.后方回声衰减","E.侧缘声影不定"]
休克患者观察的要点是什么?
下列哪种介质中,超声难以传播() ①空气 ②骨骼 ③硫酸钡 ④肝 ["A.①","B.①②","C.①②③","D.①④","E.①②③④"]
简述日光角化病的临床表现。
试述交界痣、混合痣和皮内痣的皮损特点和组织病理学表现。