????:1????600??????:????

2???300???

3???????

4????????

5???????

????7???????23???? ???23?????,6????????,????9.44??,??????????????????????8.89????????????5?????????????????????,6??10%,??????????9.7%?

??,?,6??????(1.84??????)?????(1.64???????)?????(0.89????)????(0.85?????)?

?????????????????,????,???????66.2??(???1.02?);?????,?????61.2?(????0.94?????);??????????????,?56.3?????(?????0.87??)?(????) ????:????