肉桂用治寒痹腰痛、胸痹、阴疽是因其
A．补火助阳
B．引火归元
C．散寒止痛
D．温经通脉
E．行气宽中
参考答案：C,D
维生素D缺乏性手足抽搐症有哪些临床表现？
Eric had received training in computer for one year _______ he found a job in a big company.
A．before
B．after
C．since
D．as
