唇腭裂可能的发病因素有( )
A.维生素缺乏
B.怀孕早期某些病毒感染
C.某些药物因素
D.遗传因素
E.放射线
参考答案:A,B,C,D,E
肝硬化门脉高压,可出现()
A.扑翼样震颤
B.出血倾向
C.皮肤色素沉着
D.脾脏肿大
E.蜘蛛痣
Coming at the Town Hail, the Queen was welcomed by the Mayor.
A.On reaching
B.On arrival
C.At arrival
D.At reaching