如图，抛物线 $\{\begin{array}{l}x-3<0\\ x+1\ge 0\end{array}$ （m＞0）与x轴交于A，B两点，点A在点B的左边，C是抛物线上一个动点（点C与点A，B不重合），D是OC的中点，连结BD并延长，交AC于点E，则 $\frac{CE}{AE}$ 的值是（    ）

    I'm proud of myself for this kindness I did last night. I did it 1and did the right thing. However, I was unwilling to2, because by sharing I am also sharing the3and more self-centered side of myself.

    It was last night and I 4 my shift at work. It was late and I wanted to go straight home. On my way out of the door I5 a fellow staff member and colleague. She doesn't have a6and usually either catches a taxi home or7for an hour waiting for8 staff member and friend of hers to finish work.

    In the past I've9to drive her home as she 10on my side of town. But last night I really did not want to. I wanted to 11straight home, alone. And I did not have to make “small talk”.

    So I tried to 12her, walking past her, heading down, and stealing out（偷溜）to the 13 without letting her see me and 14without offering her a lift.

    Yet, something in myself was stopping me. Something in myself made me  15her and put myself in her shoes. She had young16who she wanted to go home to attend to and, she could go home right now 17I took her, not an hour later when the other staff member and friend of hers who was taking her. So I offered. She 18  And of course, she was extremely 19 

    Well, I learned a great 20 last night about not being so self-centered and selfish!

____ P+____O₂ $\frac{\underset{\_}{点燃}}{}$ ____P₂O₅

____ Fe₂O₃+____C $\frac{\underset{\_}{高温}}{}$ ____Fe+____CO₂

____ Fe₂O₃+____CO $\frac{\underset{\_}{高温}}{}$ ____Fe+____CO₂．