????:1????????vx:???????

2???????

3??????????

4???????

5?????????

??????????????????(6????17??????),??????,????,??????5???

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

?????????????5???????????????,?????????3.7%,???1.4??????????????,????????????????????????0.51%,?????????????????????,?????????????????,??????????????????,???????,?,?????????????????,5????????20.2%;???,???18.7%???,“???”?????????????????????????,??????????

????????,?????????,5??????????????,???????????????????,????10%,????????????????4.4???????????????????,??,3D?????????????36.3%,??????33.6%,??17.3%,????,??????????

??,?????5????????????????,???8.6%???????????????????????,????????????????????????,???????????,?,??????????????????,????,??????

????????“????,??????,?????”???????5????????????,????,????????????????????????,???????

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