空气中氮气含量过多时会使氧气浓度降低,使人因缺氧而窒息
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On which options are standard access lists based?()
A. destination address and wildcard mask
B. source address and wildcard mask
C. destination address and subnet mask
D. source address and subnet mask
客户咨询的问题不是本人负责的产品问题,可以不答复客户
A. 正确
B. 错误