感冒冲剂主要用于治疗（）
A.腹泻
B.感冒
C.发烧
D.轻微外伤
参考答案：B
Doctors have to constantly update their knowledge in order to maintain their professional ______.[ ]
A. independence
B. competence
C. acceptance
D. violence
辐射防护评价（）辐射防护工作的重要组成部分。
A.不是
B.是
C.不属于
D.可能是
