补全对话,根据对话内容,在空白处填入适当选项,完成对话 A: Did you get your report card today, Scott? B: _______________(1) A: So, how did you do? B: ________________(2). A: What did your history teacher say ? B: ________________(3) A: That’s not so gooD.How about Spanish? B: ________________(4) A: That’s excellent. How about science? B: ________________(5) And she said I was lazy. A: O已知函数.(1)求的单调递减区间;(2)若在区间上的最大值为,求它在该区间上的最小值.