????:1?????:?????????

2?????????

3???????????

4???????

5????????

???????2????????????5??????????????????? ???????????“??????????????????”5????,???3?????4????4???7.3?????,??9???

???,????????????“?”?

???????????????????????????????,?(??????????????S)??,????,??,???5???

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

???“???”??,????????????,1?21?????2???3?142?????,??25??????????????????????????2?????2?????,??65????????????46.3%,??68.6%?

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