正常胎盘不运输以下哪些物质() ["A．大多数蛋白质","B．甲状腺素","C．母体IgM、IgA","D．母体和胎儿红细胞","E．游离脂肪酸"]
hCG的清除在() ["A．胃","B．肝脏","C．肠道","D．肾脏","E．胎盘"]
属于神经递质的物质是() ["A．前列腺素","B．5-羟色胺","C．内啡肽","D．谷氨酸","E．P物质"]
成年人牙冠外伤时，下列情况各应选何种上述治疗 ["釉质部分折断，牙根正常，不松()切角部分折断，牙本质暴露，牙根正常，不松动()牙冠1/2折断，露髓，牙根正常，不松动()A．调观察","B．充填治疗","C．安抚后无症状时充填治疗","D．活髓切断术治疗","E．牙髓治疗"]
下列指标在脑肿瘤中增高的是() ["A．LDH及同工酶","B．AST","C．核糖核酸酶","D．酸性磷酸酶","E．β-葡萄糖苷酶"]
畸形中央尖是属于()牙釉质发育不全症是属于()氟斑牙是属于()
