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发动机怠速工况

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在我国司法机关的工作中民主集中制原则又被称为（）

A. 权力制约原则
B. 分工负责原则
C. 公开审判原则
D. 合议制原则

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300T设备ATPCU与SDP单元硬件可以互换使用。

A. 正确
B. 错误

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游戏是学前儿童主动的、自愿的、愉快的活动。

A. 正确
B. 错误

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You are deploying two core switches，one in each building，50 km away from each other. The cross-connection between them will be a Layer 2 2-gigabit EtherChannel with an 802.1Q trunk. You configured it correctly but the link does not come up. The port is in the "admin up" state，and the line protocol is in the "down" state. The fiber link is OK. What would be the most likely reason for the link not to come up？（）

A. The switches are not the same model.
B. You are not using the correct SF
C. You are not using correct optical media converters.
D. Configuration should be modified， because the distance is longer.

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