“大医精诚”篇的作者是
A．李时珍
B．华佗
C．张仲景
D．孙思邈
E．施今墨
参考答案：D
Lingling has gone to England for a ______ English course.
A．six month
B．six months
C．six-month
D．six-months
冻害发生的原因及影响冻害的因素？
