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限制高压电网短路电流水平的措施有哪些？

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you have a DHCP server named server1 and an application server named server2. Both servers run windows server 2008. The DHCP server contains one scope. You need to ensure that server2 always receives the same ip address. Server2 must receive its DNS settings and its wins settings from DHCP. What should you do?（）

A. Create a multicast scope.
B. Assign a static ip address to server2.
Create an exclusion range in the DHCP scope.
D. Create a DHCP reservation in the DHCP scope.

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深圳航空公司的服务理念是，任何时候，自然体贴。

A. 正确
B. 错误

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对管道来说：排流点应选择在管道与铁轨间距（）的点。

A. 最大
B. 最小
C. 适中
D. 可调

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什么叫加氢裂化？

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