?

???????????????????????????????????;??3???1%-7.2%??????????????
???????????????

?
????????????????10????????????????????????????????????????

??10???????24?10?211?2??38????4?????????????????

???????.?????????
(1)?????p-???.?????????????????38,???????????
(2)?????????????????.??
(3)??????????????????????????????
(4)????????????????????
(5)?????????????????
(6)????????????.???.?????????????????????
(7)?????]??????????????

????

??

(1)?????(??)(??)?

?15???15???15??9?24?9?9??9???6

???15??10??????6??

(2)??????(??)

12??10?10?30??10?15??10

??????30???15?

A: ?????????24??10????????????????????



??????????

1.?

?3-10??????????????2~6????????????????????

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

2.???

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

??????3~5?????...

?????????????7??

?????????????????????;20-25?50-60???????;???;??????
??
????2?????????10?? 50%-100%.????????????
??
???????????????????????????????
??
??????2-4?1?6????????;?20-30????5-8?
??
?????(1-3)(10-30?)??(?????)?????40??2?;??????40?????15?;??????????
?
???(??)????????????????????15?????3-4?...