Mr. Wood _________ us three words yesterday.[ ]
A. teaches
B. taught
C. teached
答案:B
计算:-1+2-3+4-5+6-…-99+100=______.
以下哪一项不是热证的表现()
A.面赤
B.小便短赤
C.大便秘结
D.口淡不渴
E.咯痰黄稠