下列一元二次方程中，有两个不相等实数根的方程是（　　）

    Michael Greenberg is a very popular New Yorker. He is not famous in sports or the arts, But people in the streets1him, especially those who are2

    For those people, he is "Gloves" Greenberg. How did he get that3? He looks like any other businessman, wearing a suit and carrying a briefcase (公文箱). But he's4 His briefcase always has some gloves。

    In winter, Mr. Greenberg does not5like other New Yorkers, who look at the sidewalk and6the street. He looks around at7. He stops when he8 someone with no gloves. He gives them a pair and then he9, looking for more people with cold10.

    On winter days, Mr. Greenberg11gloves. During the rest of the year, he12gloves. People who have heard about him also 13him gloves, and he has many in his apartment.

    Mr. Greenberg 14doing this 21 years ago. Now, many poor New Yorkers know him and15his behavior. But people who don't know him are sometimes16him. They don't realize that he just wants to make them17.

    It runs in the18. Michael's father always helped the poor as he believed it made everyone happier. Michael Greenberg feels the19. A pair of gloves may be a20thing, but it can bring warmth in cold winter days.