解:根据题意得:x-2≥0x-3≠0
在△ABC中,若(a+b+c)(b+c﹣a)=3bc,且sinA=2sinBcosC,试确定三角形的形状.
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—I promise her daughter ________ get a nice present on her birthday.
—Will it be a big surprise to her?
得到信任最有效的办法是 ( )