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《工商行政管理执法证》的专用皮夹或者内卡单独使用时是否有效？

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局部战争实践是信息化战争产生与发展的主要动力。

A. 正确
B. 错误

个人活期储蓄无折续存业务用于冲正及其他经批准的业务。无折支取仅限于冲销错账、司法强行扣款或其他经批准的业务。

A. 正确
B. 错误

Your company has a main office and one branch office. All servers run Windows Server 2003 Service Pack 2 （SP2）.In the main office， a server named DNS1 hosts the primary DNS zone for contoso.com.You configure a primary zone for west.contoso.com on a DNS server named DNS2 in the branch office. All servers in the branch office are configured to have the west.contoso.com DNS suffix.You need to ensure that users in the main office can resolve server names in the branch office. The solution must meet the following requirements：（1）Minimize the amount of DNS zone transfer traffic between the offices. （2）Maintain the current name resolution process for users in the main office. What should you configure on DNS1？（）

A. a host record for DNS2
B. a secondary zone for the west.contoso.com zone
C. a stub zone for the west.contoso.com zone
DNS2 as a forwarder

煤气成分中属于不可燃成份的是（）。

A. 一氧化碳
B. 甲烷
C. 氮气