题型:判断题 定义f(M)=(m,n,p),其中M是△ABC内一点,m、n、p分别是△MBC、△MCA、△MAB的面积,已知△ABC中,AB•AC=23,∠BAC=30°,f(N)=(12,x,y),则1x+4y的最小值是( )A.8B.9C.16D.18 查看答案
题型:判断题 Good manners usually help people to _____ each other.[ ]A. get on well with B. get started C. get together 查看答案