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4. 60???1003?ɡ????????λ?2Σ1?
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ж?????AC???????0.1?3Σ?0.5?3Σ????÷λ?(?20???75%?500У7)??2-3Ρ??????????????
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1. ????λ20?????1С????1Σ1?
2. ???ú?Щγ?????λ?3??1Σ1?
3. 10??飬?60н7??3??????????λ?2Σ1?
4. 60???1003?ɡ????????λ?2Σ1?
5. ?60?10??????1Σ?10-30?111?
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