What is the most common cause of network congestion？（）
A. aggregation congestion occurring at the core layer where the different distribution layer devices feed traffic to the core-layer switches
B. speed mismatches when moving from a low-speed LAN environment to a higher speed WAN environment
C. flapping Ethernet interfaces caused by misconfigured LAN interfaces
D. flapping serial interfaces caused by misconfigured WAN interfaces
E. speed mismatches when moving from a high-speed LAN environment to a lower speed WAN environment
塔里木试油、井下作业35MPa节流管汇待令工况常关的是（）。
A. 节1
B. 节2
C. 节3
D. 节6
E. 节8、节9
被查机构对检查评价的意见和双方分歧的说明应当写入《（）》中。
湿分在风口前分解出O2，加湿相当于增加风温，因此调整湿分影响鼓风动能。
A. 正确
B. 错误
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