获取药物信息的途径包括（）
A.专业期刊
B.临床实践
C.学术交流
D.药品推销
E.信息系统
参考答案：A, B, C, E
Jack wasn't saying anything, but the teacher smiled at him ____ he had done something very clever. [ ]
A. as if
B. in case
C. while
D. though
病人手指并拢一手掌面积为()
A．0．5％
B．0．75％
C．1．0％
D．1．25％
E．1．5％
