上颌第一磨牙各根管口的形态是() ["A．近颊根管口较圆","B．若近颊根分为颊、舌两根管口时，两根管口较扁","C．近颊根管的舌侧根管口距舌侧根管最近","D．远颊根管口较扁","E．舌侧根管口较窄"]
下列归纳的乳牙髓腔特点不正确的是() ["A．髓室大","B．髓壁薄","C．髓角高","D．根管粗","E．根尖孔小"]
面神经颞面干和颈面干的分支不包括() ["A．颞支","B．颧支","C．颊支","D．下颌缘支","E．二腹肌支"]
贫血
简要阐述叠置法、地块法、网格法等农用地分等单元划分方法的定义及内容。
异常血红蛋白
