韧皮部有树脂状分泌物,与木质部相间排列呈3~8个偏心性半圆形环()
A.川木通横切面
B.大血藤横切面
C.鸡血藤横断面
D.通草断面
E.钩藤断面
参考答案:C
下列不属于局部麻醉的是()。
A.神经丛(节)阻滞
B.咽腔内黏膜麻醉
C.硬脊膜外阻滞
D.神经阻滞
E.区域阻滞
--- Is your mother badly ill?
---NO, ,only a little cold
A.serious anything
B.serious nothing
C.anything serious
D.nothing serious