《内经》论厥,其表现可概括为
A.肢体和手足逆冷
B.四肢抽搐、角弓反张
C.突然昏倒、不知人事
D.呆傻愚笨、智能低下
E.突然昏倒、四肢抽搐
参考答案:A,C
–Where is Mr. Zhang? –He _________ for two days. Can I give him a message?
A.left
B.has left
C.has been away
D.leaves
比的前项和比的后项同时乘一个数(0除外),比值______.