角膜上皮来源于()
A.表皮外胚层
B.神经外胚层
C.中胚层
D.内胚层
E.神经外胚层和中胚层
参考答案:A
---Why didn’t Ted go to our party?
---______his heavy cold.
A.Because
B.Because of
C.Because he was
D.For he was
婴幼儿硬膜下血肿的治疗方法是()
A.颅骨钻孔引流
B.行开颅血肿清除术
C.前囟外侧角穿刺抽吸血肿
D.腰穿排放积血
E.高渗药物保守治疗