若抛物线上一点P到定点A（0，1）的距离为2，则点P到
轴的距离为（    ）

阅读下列短文，从下面每小题的A、B、C、D四个选项中选出最佳选项，并在答题卷上将相应的字母编号涂黑。

    It was a beautiful sunny day in a small village in Africa. I was playing with the children outside. A little boy, about 7 years old, gestured to me to follow him. He had a shy smile on his small face and said something to me.

    "You want me to go to your home?" I asked. He nodded. So we went hand in hand to his home.

    We went to the place where the cabbages were growing. "Piga picha" he said … "Take a picture". Then, I took a photo and showed him the photo on the camera, and he nodded.

    We walked closer to the house and the little boy stood by the coffee tree. There his younger brother was picking coffee berries（咖啡豆）. "Piga picha" he said again. I took a picture quickly for his younger brother.

    He then pulled me by the hand to his mother's grave（墓地）around the back of the house. "Mama Sue," he said almost in tears, "Piga picha." It was my turn to nod. I silently obeyed his simple request. "Piga picha."

    A picture of a little boy at his mother's grave! That reminded me: 40 years ago, when I was 7 years old, I was also standing at my own mother's grave.

    What a day!

已知函数f（x）=aln（x+1）﹣x²，若对∀p，q∈（0，1），且p≠q，有 $\frac{f\left(p+1\right)-f\left(q+1\right)}{p-q}>2$ 恒成立，则实数a的取值范围为（   ）

2010年3月1日施行的《中国保险监督管理委员会行政复议办法》规定，公民、法人或者其他组织认为保监会或其派出机构的具体行政行为侵犯其合法权益的，可以自知道该具体行政行为之日起60日内提出行政复议申请。从公民的角度看，当其合法权益受到侵犯时，应                  （   ）
①自觉维护个人的正当利益         ②坚持个人利益和国家利益相结合的原则
③依法行使公民的基本政治权利   ④制裁和惩罚侵犯自己权益的行为人

下列各组数中，属于勾股数的是（　　）