于点M,直线PM分别交AD、BC于点T、S.证明: 2/(PM)=1/(PT)+1/(PSS)P DG DT CA FM HB SC A E B(第11题)(第12题) 相关知识点: 试题来源: 解析 (S_(△PND))/(S_(△PAC))=(S_(△PAD))/(S_(△ABC))=(S_(△PAD))/(S_(△ABC))=(S_(△PCD))/(S_ MT MS PM MT ,...
1 It’s 11:00 pm and I’m still sitting here writing this article for the school magazine! I’ve had two weeks to write it and my teacher wants it tomorrow. She’s always complaining that I leave things to the last minute. Well,I don’t want to be like that, but it seems hard...