????:1????1000???????:????

2????????

3????????

4?600?2??????????

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

????????????9??10? (????? ???????????)???????(???)10?,????99.9%?????????????????,?????9???????23????????????????????????????

????????????????,??????????????9????????????23??“?????”?,????????????,??????????????????????????4?????????????????????????

?????????????,?????????,?99.9%???????????,??9???23??,??????????????????????????0.1%?

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