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在联锁表道岔栏填写[（1/3）]表示为什么？

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矿石的氧化率对选别指标有哪些重大影响？

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广告调查的特点除了要目标明确还必须要有（）.

A. 目标明确
B. 操作性强
C. 分析资料
D. 实地调查

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钻石比色的时间不宜太长，通常最好不超过（）。

A. 4—6min
B. 6—8min
C. 8—10min
D. 10min

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Your company uses Active Directory integrated DNS. USers require access to the internet. You run a network capture. You notice the DNS server is sending DNS name resolution queries to a server named f. root-servers.net.You need to prevent the DNS server from sending queries to f.root-servers.net The server must be able to resolve names for internet hosts. Which two actions should you perform？（）

A. Enable forwarding to your ISPs DNS servers.
B. Disable the root hints on the DNS server
C. Disable the netmask ordering option on the DNS server
D. Configure Reverse Lookup zones for the IP subnets on the network

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