化学与生活息息相关．

阅读下列材料：

材料一：

材料二：孝公用商鞅之法，移风易俗，民以殷富，国以富强，百姓乐用，诸侯亲服，获魏楚之师，举地千里，至今治强。

----李斯《谏逐客书》

材料三：九年（即太和九年，公元485年），下诏均给天下田：诸男夫十五以上，受露田四十亩，妇人二十亩……十年，给事中李冲上言：“其民调，一夫一妇，帛一匹、粟二石……”于是海内安之。

----《魏书食货志》

请回答：

下列有关反射与反射弧关系的叙述中，正确的是（ ）

已知椭圆 C 的中心在坐标原点，焦点在 X 轴上，椭圆 C 上的点到焦点距离的最大值为3，最小值为1．

完形填空
       Once upon a time there was a little orphan（孤儿） who always wished that he could fly like a bird. It was very   1   for him to understand why he could not fly.
　　There was another little boy who was crippled（瘸子）. One day the orphan came to a park, where he saw the little crippled boy   2   in the sand alone.
　　He ran over to the little crippled boy and asked him if he had ever wanted to fly like a bird.
　　“No, ” he said. “  3  I've been thinking about what it would be like to walk and run like   4  .”
　　“That is very sad, ” said the little orphan. “Do you think we could be friends?”
　　“Sure, ”said the little crippled boy.
　　The two little boys played for hours.  5 of them felt as lonely as they have been before. Then the little crippled   6 father came with a wheelchair to  7  his son. The little orphan ran over to him and said something into his ear.
　　“That would be Okay, ”said the man.
　　The little orphan ran back to his friend and said, "You are my only friend and I   8 I could do something to make you walk and run like others. 9  , I can't. But there is something that I can do for you."
　　The little orphan boy turned10  and told his friend to slide onto his back. Then he began to run across the grass. He ran faster and faster,  11 the little crippled boy on his back.
The father began to cry with tears as his son shouted at the top of his   12 , "I am FLYING! Daddy, I am FLYING!"
That's the little orphan who helped the crippled boy  13 the dream to fly in his life and moved the father.14 he didn't know the reason why he could not fly, he helped another boy fly and harvested happiness from it. Let's always be ready to help others because helping others is helping   15 .