One upon a time, there were two fishermen who were good at fishing. One day, they went to a lake to1 . One of them 2 fishing alone by himself 3the other was an outgoing person who loved to 4 friends with different people.

    When the second fisherman found that some tourists at the lake couldn't catch any fish. He said to them“I will teach you how to do that. If you catch 10 fish, give me one. If you don't get 10,you 5 give me anything.”

    They felt like old friends at the first sight. Both sides come to a(n)6 immediately. After he finished teaching a group, he went to teach another, and 7 taught them some fishing skills.He asked one for every 10 fish the tourists 8 .

    At the 9 of the day, the fisherman who kindly helped others received a(n)10 basket of fish, and also got to know a large group of new friends. At the same time, he was respected（尊重）as a(n)11 .

    However,12 fisherman didn't have much fun. When the others circled around his camp, he became even more 13 . After fishing for a whole day alone, he looked into the 14 basket,and found he had far fewer fish than his friend.

    If we 15 others succeed, we get both success and friends.

下列关于不同动物体结构与其生活环境相适应的因果关系的叙述，不一定的是（　　）

四棱锥P﹣ABCD的底面ABCD为正方形，PA⊥底面ABCD，AB=2，若该四棱锥的所有顶点都在同一球面上，且该球的表面积为$\frac{81\mathrm{\pi }}{4}$，则该棱锥的高为（　　）

在我国，依法治国就是广大人民群众在党的领导下，依照____的规定，通过各种途径和形式管理国家事务，管理经济文化事业，管理社会事务，保证国家各项工作都____。