题目

We had over 120,000 people here at _____ weekend and expect to have up to ______ third of that number on the beach today A．the; a           B．the; the        C．不填; a        D．a; the 答案：A 已知：如图，在等腰梯形ABCD中，AB∥DC，四边形AEBD是平行四边形，CE交AB于点F，求证：EF＝CF．