This is a story about a famous scientist. After reading it，you may know what made him 1 from others.He said all his success came from an experience that happened2 he was five years old.At that time，he tried to take 3 bottle of milk away from the fridge.However，the bottle 4 and the milk was all over the kitchen floor.

    When his mother came in，instead of shouting at 5，she said，"Ben，what a great mess you have made!I have never 6 such a big puddle of milk.Would you like to play in the milk 7 a few minutes before we clean it up？

    Actually，he did.After a few minutes，his mother said，"Ben，you have made a mess like this，8 you need to clean it up.9 would you like to do that？With a towel or a mop（拖把）？"He  10 the towel and they cleaned up the milk together.

    Then his mother said，"You were not able 11 a big milk bottle with your small hands in the kitchen.Let's 12 the bottle with water and see if you can discover a way to carry it without  13 it."Finally，the

boy learned that if he held the bottle with14 hands，he could carry it and it wouldn't drop.

    From then on，the boy knew he didn't need to be afraid15 making mistakes.It was more important for him to find a way to correct the mistakes.

阅读下列材料，结合所学知识回答问题：

材料一：1972年2月，尼克松乘坐的飞机缓缓降落在北京机场，尼克松走下飞机舷梯，离地面还有三四级台阶时，就向前来迎接的中国总理周恩来伸出手。周恩来诚挚地说：“总统先生，你把手伸过了世界最辽阔的海洋和我握手，25年没有交往了啊！”……从尼克松与周恩来握手的时刻起，“一个时代结束了，另一个时代开始了”。

材料二：不同时期中美领导人的握手（如图）。

请回答：

    Have you been asked for money by some disabled beggars (乞丐) while you're enjoying shopping? Do you have any pity on them who are so poor and lonely or do you just feel afraid of their terrible shapes? As one of the most special groups, disabled people's living conditions — not only their material (物质的) conditions, but their mental (精神的) world — really need improvement.

    The treatment for disabled people should go like this: First, don't look down upon them. Don't be afraid of looking at the terrible shapes of the disabled. Try to treat them equally. Because they are a part of the society (社会),we can't discard (抛弃) them. The second is to help them as much as we could. If you can be a volunteer and do some work for the disabled people, that would be very nice. That does help not only to the disabled people but also to yourself because you will feel good after your kind action.

    If every one of us gives a little love, the world will become a beautiful wonderland!

下列物质中，含非极性共价键的离子化合物是（　　）

已知t=a+2b，s=a+b²+1，则t和s的大小关系中正确的是（　　）