为争夺战后世界经济的主导权，英美两国于1943年7月分别发表各自的战后方案，即美国的“怀特计划”和英国的“凯恩斯计划”。战后，英美两国展开了激烈的斗争，在美国允诺给英国巨额贷款的诱压下，英国被迫接受了美国的方案。这充分说明  

一个直角三角尺的两条直角边长是6和8，它的斜边长是10，将这个三角尺绕着它的一边所在的直线旋转一周．（温馨提示：①结果用π表示；②你可能用到其中的一个公式，V_圆柱=πr²h，V_球体=$\frac{4}{3}$πR³，V_圆锥=$\frac{1}{3}$πr²h）．

（1）如果绕着它的斜边所在的直线旋转一周形成的几何体是什么？．

（2）如果绕着它的直角边6所在的直线旋转一周形成的几何体的体积是多少？

（3）如果绕着斜边10所在的直线旋转一周形成的几何体的体积与绕着直角边8所在的直线旋转一周形成的几何体的体积哪个大？

   Today Grandma comes for a visit. She gives my sister and me a box of chocolate candies. We say "thank you!"
   Then Jenny quickly takes off the box. The pieces all look the same! I can't tell which pieces are hard inside and which are soft! I only like the soft ones. Jenny does not care. She is happy to get any kind of candy!
   I slowly look at all the pieces; I don't know which one to choose. Just then Dad calls us Grandma is going home, He wants us to say goodbye to her. I hurry to the front door where they are standing. Jenny comes a few minutes later. I say, "Grandma, I hope to see you soon. I always feel sad when you leave. "Jenny stands behind me and doesn't say anything. After Grandma goes home, I find out why Jenny doesn't say anything.
   She has most of our candies in her mouth! Only a few pieces are left in the bottom of the box! Then I'm sad!