题目

如图，CD是△ABC的角平分线，AE⊥CD于E，BC=6，AC=4，△ABC的面积是9，则△AEC的面积是。 答案：【1】3My computer ______yesterday .I must get it repaired this afternoon. A. broke up　　 B. broke out　　　　 C. broke down　　 　 D. broke over