题目

Throughout this long, tense election, everyone has focused on the presidential candidates and how they’ll change America. Rightly so, but selfishly, I’m more fascinated by Michelle Obama and what she might be able to do, not just for this country, but for me as an African-American woman. As the potential First Lady, she would have the world’s attention. And that means that for the first time people will have a chance to get up close and personal with the type of African-American woman they so rarely see.Usually, the lives of black women go largely unexamined. The prevailing theory 若直线（a＞0，b＞0）过点（1,1），则a+b的最小值等于 A.2   B.3   C.4   D.5