1．用汇编语言编写一个打字计时练习的程序，在缓冲区中预放一些字母,运行时,可按照屏幕上显示的字母输入练习；

2．按某个键开始练习，每输入完一行按回车键后,可显示出练习的时间；

-1. Using assembly language to write a timed typing practice procedures in the pre-amplifier in the buffer zone of some letters, run-time can be displayed on the screen in accordance with the input of letters to practice　2. Began to press a key on every imported finished his press Enter, you can show that the time to practice