关于扩大基托面积原因的描述,错误的是() ["减少单位面积受力","增加义齿强度","增加义齿吸附力","增加大气压力的作用","利于组织保健"]
下列有关鳃弓的描述,错误的是() ["A.由间充质增生形成","B.人胚第4周出现","C.相邻鳃弓之间为鳃沟","D.共5对鳃弓","E.位于头部两侧"]
典型麻疹首先出现皮疹的部位是() ["面部、颈部","耳后、颈部发际边缘","躯干","四肢","手、足"]
穿、脱隔离衣法的评价
胚胎的受精龄(实际胚胎龄)应为() ["A.280天","B.266天","C.300天","D.270天","E.以上都不是"]
试述对于起重机司炉工作质量有什么要求?