作业题目是：将字符串"apple", "grape", "pear" 写入到磁盘文件f12-5.txt中，然后再从该文件中读出，显示到屏幕。-Job title is: the string " apple" , " grape" , " pear" is written to a disk file f12-5.txt in, and then read from the file is displayed to the screen.

opc client 自动化接口访问 opc 服务端读取数据..........(Supplement Facts One teaspoon provides Grape seed Extract(OPC MIN 95% Proanthcyanidins)-----50mg Red Wine Extract--------------50mg Pine Bark Extract--------------50mg Bilberry Extract----------------25mg Gr