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

2???????

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

4???????????????

5???????

??????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????(?) ??????:?????