主治痰壅气逆食滞证的方剂是()
A.定喘汤
B.小青龙汤
C.九味羌活汤
D.三子养亲汤
E.苓甘五味姜辛汤
参考答案:D
如图所示的实验,目的是“探究声音的音调高低由什么因素决定”,根据你的探究经历可知:塑料尺伸出桌面的长度越长,塑料尺振动得越慢,音调越______.即声音的音调高低由物体振动______决定的.
She's never seen such a good film, ____ she? [ ]
A. is
B. isn't
C. has