题目

. I don’t like getting up too early unless I have to. When you’re filming, you’ve got make-up on, which doesn’t happen often. As I’m not filming at present I’ll get up at 8.30. Work normally means Matt coming over to my house about 10 am. We’re writing at the moment. We’ll chat for a bit before going to my study. One of us will have an idea for a sketch (梗概), we’ll talk about the characters and when we feel we have enough we’ll start writing. Matt and I met at the National Youth Theatre in 1990 and started doing shows together in ’95, at the Edinburgh Fringe festiva如图，△ABC是等边三角形，BD是中线，P是直线BC上一点，CP=CD．求证：△DBP是等腰三角形．