贝壳 app for iPhone and iPad

4.0 ( 7120 ratings )

Education Book
Developer: Beijing Huanqiu ZhiKang Shidai Education Consulting Co.,Ltd

Free

Current version: 5.3, last update: 8 years ago
First release : 27 Feb 2015
App size: 38.33 Mb

习题多多，有更多题目可以给学生老师阅读。