我国现存最早的临证医方专书为
A.《黄帝内经》
B.《五十二病方》
C.《伤寒杂病论》
D.《肘后救急方》
E.《治百病方》
参考答案:B
最早出现的二期梅毒疹是()。
A.丘疹性梅毒疹
B.掌跖梅毒疹
C.扁平湿疣
D.斑疹性梅毒疹
When I passed this afternoon, I saw a little boy was lying on the grass, his hands _____ under his head.
A.having crossed
B.crossing
C.crossed
D.to cross