?? ??(?)??????? ???????????
![](https://image.chezhanri.com/2019/1129/b4fff136fb8e250ca42ebe6029448989.jpg)
????:1??????SPA???:??????app
2?????
3???????????????
4?????
5???500???????
????????7??????4????? (? ????????????)??????????????4????????????,?(??)?????,??????????????
???,??,?????????????(?????????????)????,??????????????
“???(?)?,???”?????
??????????,???(?????????????)?,???????????“???????????????,?,??????????”(??) ??????????????:???????????????????????????