题目

Baby giant pandas ________ a lot of time ________ their mothers’milk every day．          A．spend；to drink                  B．cost；drinking          C．take；to drink                     D．spend；drinking 答案：D如图，四边形ABCD是平行四边形，点F在BA的延长线上，连接CF交AD于点E．(1)求证：△CDE∽△FAE．(2)当E是AD的中点且BC＝2CD时，求证：∠F＝∠BCF．