简单的英语出题系统，带有判分功能。说明：只实现了简单的单选题，读者可自己增加另外的功能，实现原理一样。要先注册数据源，并起名为英语出题及判分系统。-out in simple English that system with sub-contracting functions. Note : only achieve a simple Single-option, readers may increase their own separate functions and the same pri