Which of the following contribute to congestion on an Ethernet network?（）
A. Use of full duplex mode.
B. Creation of new collision domain.
Creation of new broadcast domain.
D. Addition of hub to the network.
E. Use of switches in the network.
F. Amount of ARP or IPX SAP traffic.
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推进严格司法，如何确保案件处理经得起法律和历史检验？
当中毒物质不明时可选用（）洗胃
A. 牛奶或蛋清水
B. 液体石蜡
C. 清水或生理盐水
D. 10%活性炭悬液
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