根据《素问·阴阳应象大论》，通过“审清浊”，可以
A．别阴阳
B．知部分
C．知所苦
D．知病所主
E．知病所生
参考答案：B
The look on her face suggested that she _____ it before _____.
[ ]
A. amazing, wouldn't know
B. amazed, hadn't known
C. amazing , hadn't known
D. amazed, shouldn't know
下列哪项描述不符合食管癌的临床特征（）.
A.进行性吞咽困难
B.持续性下咽哽噎感
C.与年龄有关
D.与性别有关
E.下段多于中段
