题干
You use_________ to emphasize(强调)that you are referring to(指的是)one thing.
A：successful
B：personal
C：single
答案(点此获取答案解析）
C
You use_________ to emphasize(强调)that you are referring to(指的是)one thing.
A：successful
B：personal
C：single
x2有下列结论：
；③二次函数y=（x-x1）（x-x2）+m的图象与x轴交点的坐标为（2，0）和（3，0）．