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常用的钨钛钴类硬质合金的牌号（）、（）、（），适宜加工（）材料，精加工用（）牌号。

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移栽前（）天，在秧苗不萎蔫的情况进一步控水蹲苗；在无低温的情况下（）通风炼苗。增强秧苗的抗逆性锻炼，提高秧苗素质。

Your company has two offices. Each office is configured as a separate subnet. The network contains a single Active Directory domain. All servers run Windows Server 2003 Service Pack 2 （SP2）. All client computers run Windows XP Professional Service Pack 3 （SP3）. Users report that they are unable to resolve host names on the Internet. You verify that users can access all servers on both subnets.You need to ensure that users can resolve names on the Internet. The solution must ensure that users can access resources on the internal network. What should you configure？（）

A. all client computers to use the IP address of a DNS server on the Internet as the primary DNS server
B. all client computers to use the IP address of a DNS server on the Internet as the secondary DNS server
C. the internal DNS servers to use a forwarder
D. the internal DNS servers to use round robi

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提高焊接接头疲劳强度应采取哪些措施？

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悬吊式锅炉水封槽在启停时它能保证（）膨胀的间隙，又保证冷风不从间隙中侵入。

A. 水冷壁横向
B. 水冷壁向四周
C. 水冷壁向上
D. 水冷壁向下

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