题目

 — How about your journey to Shanghai?    — Everything was wonderful except that our car ________. A. slowed down            B. put down           C. got down                 D. broke down 答案：Da，b，c分别为△ABC内角A，B，C的对边，，，，（1）求∠C；（2）若a+b=5，c=4 求△ABC的面积．