????:1????????:????kb??

2????????????

3?????150?????

4???????100?????

5?????????

?11???23??????(?????????? ??)11????23??????????,“???????????”????????????,???????

???????????? ?????

????,??????????,???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????30?????????????80????,??,??????

??,?????????????????????????????????????????;????,????«GB/T23776????»??????,????5????????????????5?????????????????

???????? ???????

???????,????,????????????????????????????????????,??????(??????????)??,??????????????????????????,??????????

??????????,???????,???????????????????,???????,????????????????????????

????,????“????”????,????????????,???????????,??????«??????»«???????????»«??????»???????

??????????? ????????????

“?????????????????,????????”???,????????,????????????????????,??????????,??;??????????,??,???

????,??????,?????????“???????????”?????????????????,??????????????????,“???????????????”????“????”????????????????????????39.2??????,????????????120?,??????????2??????????,90%?????,75%?????“????”?????????54.76????,?????????????????(????)

??:??????????