若三角形其中一边为5cm,另两边长是x2﹣7x+12=0两根,则三角形面积为( )。
6
—Why are you late again?
—Something happened to our friend Wang Fei. I _____ to help him.
A.did refuse
B.needn’t have refused
C.couldn’t well refuse
D.did not say no
使用苦楝皮时应注意()使用槟榔时应注意()
A.本品有一定毒性,不宜持续和过量服用
B.脾虚便溏者,不宜服用
C.大量服用能引起呃逆、眩晕、呕吐等反应
D.与热茶同服,可致呃逆、腹泻
E.本品与乌头相反