??2??????21????????????????? ?:???2???????????20????,??,??????????????,??????????99.9%???????????,0.1%???????

????????????????????????????????????????????

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

?«?»???????????????????????????????????????????,?????????????“???????????????”?,??????????,???????????,??????????????????,??????????

????????,??????????????(?) ????:???????? “??spa????”????

?? ?? ?????????????99.9%????

????:1???spa????:????

2?????????????

3????????

4?????????

5????????????

??2??????21????????????????? ?:???2???????????20????,??,??????????????,??????????99.9%???????????,0.1%???????

????????????????????????????????????????????

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

?«?»???????????????????????????????????????????,?????????????“???????????????”?,??????????,???????????,??????????????????,??????????

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