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