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
—Can you describe _____ it happened?
—Yes, I was riding on my bike _____ a car knocked me down from behind.
A．when; as
B．how; as
C．how; when
D．how; while
