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由光亮处走进暗室，从什么也看不见到慢慢地看见周围物体，叫做（）。

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The diesel engine valve subjected to most severe conditions of service is the （）.

A. cylinder exhaust valve
B. air starting valve
C. air inlet valve
D. cylinder relief valve

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如何开展配电网风险分析与预控工作？

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You have a Windows Server 2008 R2 Hyper-V server with two network adapters named Adapter1 and Adapter2. You need to configure the server to host virtual machines （VMs） on different networks. Which two actions should you perform on the host server？（）

A. Set Adapter1 as a management interface.
B. Configure Adapter1 to support jumbo frames.
C. Set Adapter2 in Trunk mode， and configure VM VLAN tags.
Disable TCP Chimney support on Adapter2， and configure VM VLAN tags.

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齿轮传动的缺点之一是遇到超载负荷时，不能保护机械免于损坏。

A. 正确
B. 错误

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