?? ????3.1?????????:???,????????
????:1?????300?3??vx:??????
2????????
3??????
4?????98?
5???????100???????
?2????7? ?7??,??2?????????35???????????????3.1?????????????????37.14?,?????127.76???,??????9???
???,?(P?????????????)????????????4.2??????,???3.1???????
??,?,??,???44???????????,?,?????
?,??????,????????????????2????????????????54????????????,?23??????3?,???? ???????????:????