如果两个相似三角形周长的比是2:3,那么它们的相似比是____
— Excuse me, w____ is the cinema?
— Walk straight for three minutes.
惜秦皇汉武
In some ways, Lily and Lucy look ________, but the twins are a little different ________ each other.
用分子的相关知识解释下列生活中的现象,其中错误的是( )