1）、缓冲区中预放了一些字母2）、运行时,可按照屏幕上显示的字母输入练习3）、当按结束,可显示出练习输入的时间,并且能显示出正确率。4）、要求界面美观-1), the buffer zone in the pre-release a number of letters 2), run-time, in accordance with the letters displayed on the screen input practice 3), when by the end of practice indicates that the importation of the time, and can show the correct rate. 4), requested interface appearance