下面两张图来自美国哈佛大学。现在有两位同学，分别表达了对“图一”的理解。请你读“图二”，将你的理解写下来。（不少于20字）

“图一”理解：

同学一：如果我们用欣赏的眼光对人对事，你会发现别人的优点，此时我们是快乐的！

同学二：善于发现美好的事物，并懂得感恩，就会感到幸福。

    The Sea Life Centre is a Really Exciting Place
    Good morning, everyone.1 to the new Sea Life Centre at Plymouth.The Sea Life Centre is a really exciting place. There are so many things to2here and everything is enjoyable. It costs $3.76 for adults ,  $2 for children and 3 for over sixties and school groups. It's 4 from 9:00am to 4:30pm every day except 25^th and 26^th of December.Special 5include hourly feeding times for all the different animals and fish, and shows in the sea life theatre. 6  is always there to answer questions about what you've seen. 7 you are in a group of six or more people, we  8 give you a special guided tour of the centre. But you 9 to arrange(安排 ) this at the information desk when you 10.
    The latest attraction(吸引人的事) is a big 11 tunnel(隧道 )you can walk through. All around you, you will see fish swimming--- sometimes even over your head. You certainly have the 12view(景色 ) of the undersea world. Children 13 it and it's really amazing for adults, too.
    When you get 14, there is a relaxed family dining room serving food.That's all. For 15information, phone 091743-564219. Have a good time! Thank you.

用来判断选择培养基是否起到了选择作用需要设置的对照是（     ）

1861的美国公布《反联邦脱离法》，林肯曾就此比喻道：“为保全生命，往往不得不把手脚截掉，但决不会为了保全手脚而断送生命。”他所说的“保全生命”是指（  ）