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

2??????

3???????

4?????app???

5??????????

????,?,????????,???????????????15???,???6????????????????????????,??

??????8???16?????????????????18???????????????,?????????40.89???,??????8??????????????15?????0.05??????????,???????0.77?,?0.37??????,???0.69??

?????? ???:????????????,?,???????????,?40~80?????????????,???1.5~3????

?????????????????,?20????????

?? ?:?????,??????????,????????????????????????????,?????????????,?????????

???,??????,?,24?,????????????? ?????????????:??????????