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2102The above design, as commented above, when executing the Resize method of SmartTest, if a rectangular object is passed in, when the height is greater than the width, the width will be automatically increased until it exceeds the height. However, if a square object is passed in, it will fall into a dead loop. The fundamental reason at this time is that rectangles cannot be the parent class of squares. Since there is a problem, they can be reconstructed so that both of them inherit from quadrilateral classes. The refactoring code looks like this:青山上生青木，长河边种槐杨。中情局特工阿什顿·艾维（Ashton Ivy）于11月返回美国，带走了他对玛丽娜的爱，同时帮助俄罗斯保护其自然财富。听说北边的羊肉特别好吃，冬天吃最补。1936年，太行山附近的杂技之乡来了一支日本的杂技表演团体“大和班”，他们前来与当地最为著名的杂技团体“永春班”和“华勇班”切磋技艺，可是竞技的背后却隐藏着很大的阴谋，并借机羞辱中国的国技杂技艺术。大和班通过奸诈手段接连打败了永春班和华勇班。抗日战争爆发，永春班的龙战海和华勇班的凤姑刘奎等人摒弃前嫌，联手抗敌，与大和班在擂台上几次较量，最终战胜了大和班，捍卫了中国杂技的荣誉，并配合八路军凤姑的小叔侯振国，粉碎了鬼子的阴谋。Move