叶天士所谓“浊邪害清”的临床表现是（）。
A.口鼻咽唇干燥
B.耳聋鼻塞
C.昏谵舌謇
D.溲短尿浊
E.脘腹胀满
参考答案：B
— Could you tell me _____ it is from here to the science museum?
— It's about half an hour's walk. [ ]
A. how far
B. how long
C. how soon
土壤空气的扩散
