穿透力最强的局部麻醉药是（）。
A.普鲁卡因
B.丁卡因
C.利多卡因
D.左旋布比卡因
E.碳酸利多卡因
参考答案：B
Unluckily, my grandma fell downstairs and her legs were badly _______.
A． hurt
B．hurted
C．hit
D． hurting
汽蒸方法大体可分为()和干蒸。
A．混合蒸
B．单独蒸
C．湿蒸
D．多种蒸
