求解

怎么能不是奶夫也可以挤牛奶https://pan.baidu.com/s/8Z9A0B1C2D3E4F5G6H7I?pwd=nop3 _{https://pan.baidu.com/s/1B2C3D4E5F6G7H8I9J0K?pwd=tuv5}

https://pan.baidu.com/s/6N7O8P9Q0R1S2T3U4V5W?pwd=abcd

https://pan.baidu.com/s/5V6W7X8Y9Z0A1B2C3D4E?pwd=efg3

https://pan.baidu.com/s/3C4D5E6F7G8H9I0J1K2L?pwd=ijkl