下列哪种不是PFM的适应症() ["A.氟斑牙","B.牙体缺损大无法充填者","C.前牙错位扭转不能正畸治疗者","D.青少年恒前牙的四环素染色牙","E.需要做烤瓷桥固位体的基牙"]
“跋前踬后”比喻() ["顾此失彼","前后矛盾","本末倒置","进退两难","反复思考"]
联合国决定“国际残疾人年”为()。 ["1980年","1981年","1983年","1985年","1982年"]
男性婴儿尿道梗阻的重要原因是() ["结石","结核","肿瘤","狭窄","先天性后尿道瓣膜"]
铸造全冠面预备的间隙应为() ["0.3~0.5mm","0.5~1.0mm","1.0~1.5mm","1.5~2.0mm","2mm以上"]
中骨盆平面狭窄的临床表现入口平面狭窄的临床表现出口平面狭窄的临床表现