需氧环境是指
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需氧环境是指
A、20%CO2,80%N2
B、5%O2,85%N2,10%CO2
C、10%O2,85%N2,5%CO2
D、85%N2,15%CO2
E、80%CO2,20%N2
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正确答案:
B
答案解析:
暂无解析
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