ssd3答案,包括练习1到练习8，和日常练习1到9-the answer of the ssd3,including the exercise and the practical quiz.The exercise one to eight and the practical quiz one to nine.Exercise 1.ShoppingCartApplication

jQuery点击展开收缩手风琴代码，自制简单实用的手风琴问答列表突出展示效果，欢迎使用（不兼容IE6，7，8）。-JQuery click on the accordion accordion code, simple and practical accordion quiz list to highlight the effect of the show, welcome to use (not compatible with IE6, 7, 8).