? ????5.6????????????

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