?? ??????????????28?!?4×5??????
![](http://n.sinaimg.cn/front/120/w1440h1080/20190324/pi5B-hutweze8396270.jpg)
????:1????????:?????????????
2????????
3????????
4????????
5???????
2??12???,????4×5?,?????????????????????????????????????????????
????(???)??????,???????????(??????????????)
??:?????2??12???,????4×5?,?????????????????????????????????????????????
????(???)??????,???????????(??????????????)
??:?????????:1????????:?????????????
2????????
3????????
4????????
5???????
2??12???,????4×5?,?????????????????????????????????????????????
????(???)??????,???????????(??????????????)
??:?????