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非中心站章保管车站，须准备至少（）张已加盖（）章的致歉信，保存于（）室，以备使用。
在金融衍生工具中，远期合约的最大功能是（）
涤纶树脂生产工艺中的直接缩聚法就是直接将（）与（）进行缩聚制备聚对苯二甲酸乙二醇酯。
进口替代贸易政策
You are the network administrator for The network consists of a single Active Directory domain named The domain contains 15 Windows Server 2003 computers and 3,000 Windows XP Professional computers. All client computers are running the most recent service pack. You install and configure Software Update Services (SUS) on a server named Testking1. You install the Automatic Updates client on all client computers. All client computer accounts are in the Clients organization unit (OU). Currently all client computers obtain their Windows security updates from Windows Update. You want all client computers, and no other computers, to obtain their updates from Testking1. You need to configure all client computers to obtain Windows security updates from Testking1. You need to accomplish this task with the minimum amount of administrative effort. What should you do?（）
离心泵是由泵体的的前、后盖2种部件组成的。
渗透性强的砂土变形量完成的较快，而高压缩性土完成较慢。
2011年美国的进出口额约为2万亿美元，GDP约为10万亿美元，因此，美国当年的对外贸易依存度约为（）。
下列对传统舞蹈的描写，哪一项是错误的（）。
胃体胃炎的主要病因是（）
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