Mrs. Smith helps me a lot my English. I often ask her help when I have problems with English.
A:to; for
B:with; for
C:with; about
D:for; with
图(a)粮票 图(b)股票
下列计算正确的是
在△ABC中,若sin2A=sinB·sinC且b+c+ab+c-a=3bc,则该三角形的形状是( )