958188 2022-04-01 22:56 过D点做DH//CF交AB于点H所以 开发者_如何学运维AE/ED = AF/FH （平行线分线段成比例定理） 因为 BD=DC，DH//CF所以 BH=FH （平行线分线段成比例定理）所以 AE/ED = AF/FH = AF/（BF/2
After some specified inactivity time (IDLE Time say for 10 mins) the application should give a pop up box with a timer (should display 开发者_如何学Pythonlike 60 59 58 ....1), that box should close wi
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