Destruction of the environment is one of the most ____(挑战)we face.
如图,在边长为1的小正方形组成的网格中,△ABC的三个顶点均在格点上,则tan∠ABC的值为( )
16米布裁剪童装,每套童装用布1.5米,最多可以裁剪多少套童装?还剩多少米布?