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