题目

阅读理解。 Lost：A white dog My name is Alan Green. My phone number is 216－0911.You can e－mail me at alan6512@163.com. Found：A purple schoolbag An English book，a dictionary and some keys are in it. My name is Jenny Black. My phone number is 612－7878. Found：A photo I found a photo in the school library. A teacher，a girl and a boy are in the photo. The teacher is in a blue jacket. Is it yours？Call Mike at 216－9871. Lost：A model plane I lost my model plane. I must find it. Call Bill at 678－0911.E－mail me at bill808@126.com. 根据材料内容，选择正确的答 过一点有且只有一条直线与已知直线垂直． (　　)