热传导就是物质能量较高的分子流动到能量较低的分子处。()
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Whichtwoofthefollowingstatementsdescribearoutedswitchportonamultilayerswitch?()
A. Layer2switchingandLayer3routingaremutuallysupported.
B. TheportwillnotbeassociatedwithanyVLAN.
C. TheroutedswitchportsupportsVLANsubinterfaces.
D. TheroutedswitchportisusedwhenaswitchhasonlyoneportperVLANorsubnet.
E. TheroutedswitchportensuresthatSTPremainsintheforwardingstate.
锅炉的反平衡热效率是指锅炉的输入热量与锅炉的各项热损失之间的热平衡关系。()