题目

下列说法:①过两点有且只有一条直线；②射线比直线少一半； ③单项式 的系数是 ；④绝对值不大于3的整数有7个；⑤若 ，且 ，则 一定是方程 的解．其中正确的个数为（） A . 1 B . 2 C . 3 D . 4 答案：C—Mike , you look so excited.—Yeah! There a tennis game played by Li Na this evening.A. will have B. is going to be C. is going to have D. are going to be