切换图片（三种方法）： 1.点击“左右按钮” 2.键盘“←→”方向键 3.点击左边和右边的图片 点击中间的图片放大-Switching pictures (three methods): Click the left and right buttons 2 keyboard " ← → arrow keys to Click on the picture of the left and right click on the middle picture to enl