题目

如图，菱形ABCD中，AB = 4，∠B = 60°，AE⊥BC，AF⊥CD，垂足分别为E，F，连接EF，则△AEF的面积是 A．                      B．                       C．                      D． 答案：B There are a lot of ________. ( )A. thingB. thingsC. a thing