【多选题】
Which two SNMPv3 services support its capabilities as a secure networ k manage protocol？ ___
A. access control
B. the shared secret key
C. authentication
D. authorization
E. accounting
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AC
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第370题：在碳三加氢反应器重新投用时，在进料后方可缓慢通入氢气。进料前应检查氢气注入阀的上游阀及旁路阀是否关严，以防止注入阀内漏造成氢气过量注入而导致飞温
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