Who _____ English best in your class? [ ]
A. speak
B. speaks
C. speaking
D. to speak
答案:B
咳吐痰多,胸闷体胖,或局部有圆滑包块,苔腻脉滑,属()。
A.痰证
B.水停证
C.饮停胸胁证
D.饮邪客肺证
E.饮停心包证
使用纤维介质为什么能使空气过滤除菌?