问题
单项选择题
准平衡过程是指（）的过程。
A.弛豫时间很长
B.不平衡势差无限小
C.温差无限小
D.压差无限小
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
准平衡过程是指（）的过程。
A.弛豫时间很长
B.不平衡势差无限小
C.温差无限小
D.压差无限小
参考答案：B
There're different kinds of animals in the zoo. We see the zoo keepers give them to eat. They don't have to food by themselves. They just eat, walk and all day. So many of may think that the animals there happy and lucky. But most them are sad. Why? They're free. Animals like elephants, monkeys and tigers live freely and happily in or mountains. Tigers, example, run, jump, play with their children catch small animals for food. But now they have to stay in rooms in the zoo. Their life in the zoo is different from their life in the forests. Now many of us think animals should go back to forests and mountains so that earth will become better.
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