????:1???????:??????

2????????50?

3????????????????

4???????

5???????400?3??

???1?30? ??????????,30?,?5.6????,????????21??????????6.4???????

????????????????,30???10?????11?????,?5.6???,??????10????????????,????5????,????10????????????4????????????,??3.2?????4.3?,??

??????????,????????,??????????,???????????????????????

?,30??????????10???11??5.2???(???????????) ????????:??