伸出你的双手，按如图所示将双掌合拢，用力向内挤压，尽量排除手掌间的空气．多次挤压感觉掌心会微热，这是靠______ 方式改变物体的内能，两手掌猛然分开时，会感觉到有阻碍，这是因为受到
______的作用．
（1）多次挤压感觉掌心会微热，这是靠手掌对空气做功，内能增大；
（2）将双掌合拢，用力向内挤压尽量排除手掌间的空气，使手掌内气压很小．两手掌猛然分开时，要克服大气压的作用，所以会感觉到有一种力量阻碍两手分开．
故答案为：做功；大气压．
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| If you are hungry,what do you do? Have your favorite meal and stay quiet? Just like your stomach, your mind can be 1 , too, but it never lets you know because you keep it busy _2 about your dream lover, favorite star and a number of othcr silly things. So it silently pays attention to your needs and ncvcr lets itself grow.When the mind 3 its freedom to grow, creativity stops. Well, this is the result of using our brains to think of unimportant things. The hunger of the mind can be satisfied through wide 4 . Reading is a kind of useful tool which we have used since childhood. We have to read to get help. When you read a book, you don't just run your eyes across the lines. You should put your 5 into it while you are reading. The interesting part of the book is stored in your mind as a seed. This seed will be unknowingly 6 in the future when you develop new ideas. If it is used many times, the seed can 7 you link a lot of things together which you would never have thought of before!This is nothing but creativity. | |||
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