题目

 That' s________. A. James and Charles father B. James and Charles's father C. James's and Charles's father D. James's and Charles father 答案：B根据下列已知条件，能够画出唯一△ABC的是_____（填写正确的序号）．①AB＝5，BC＝4，∠A＝60°；②AB＝5，BC＝6，AC＝7；③AB＝5，∠A＝50°，∠B＝60°；④∠A＝40°，∠B＝50°，∠C＝90°．