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长方形、正方形、圆是我们熟悉的朋友。大家知道吗?它们都是变身能手呢! 数学课上,老师让我们拿出一张长方形纸,问道:
Rectangular, square, circle is our familiar friend. We all know? They are transfiguration experts! Math class, the teacher let us come up with a piece of rectangular paper and asked: