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