题目

如图，直角三角形纸片ABC，AC边长为10cm，现从下往上依次裁剪宽为4cm的矩形纸条，若剪得第二张矩形纸条恰好是正方形，那么BC的长度是cm． 答案：【1】20----What do you think of the new English teacher?----____she is an elegant lady, she can be extremely difficult to work with.A. While B. When C. As D. Even if