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2???????

3????????

4????????100?

5????????

???2?????????????????????????????13??? (? ??)???????????????????????????(?)??13?,±800??????,?????????????

????,????????????????????????????,?,?26??

2?12???????,?????????,???????????????????±800?????????????????????????????????? ???????

±800????????,??????????????????????????????2020?6??????30?,??????????????????????????????5???????????????,????700????????????????????????

?????????????????±200?±400?±600?±800??????????,?6?????????????1??????????1??±200????????

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

??????,??????????????,???2000??,?????????

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