题目

Where did the dialogue probably happen?A. In a street. B. In a shop. C. In a school. 答案：【答案】A【解析】原题是听力，解析略。在下列四个结论中，正确的有（1）的必要非充分条件；（2）中，A>B是sinA>sinB的充要条件；（3）的充分非必要条件；（4）的充要条件.A．(1)(2)(4) B．(1)(3)(4) C．(2)(3)(4) D．(1)(2)(3)(4)