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患者，男性，68岁。慢性支气管炎病史。近5天咳嗽咳痰加重，痰量增多，有较多黄脓痰，活动后气促明显。体温38.1℃，WBC10.9×109／L，中性83%。应选用下列哪种抗生素（）
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关于道德权利，下述提法中正确的是（）
用同一种限制酶切割载体和目的基因后进行连接，连接产物会含大量自身环化载体，采用下列哪种酶处理，可防止载体自身环化（）
Your network consists of two subnets named Subnet1 and Subnet2. You have a server named Server1 that runs Windows Sever 2003 Service Pack 2 （SP2）. Server1 is located on Subnet1. Users from Subnet1 report poor performance when they connect to Server1. Users from Subnet2 report that they are unable to connect to Server1. You monitor both network segments and discover a large number of NetBIOS broadcasts on both network segments.You need to reduce the number of broadcasts on the network. What should you deploy？（）
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