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进行静压沉入桩施工的作业人员，应按国家规定的时间内容进行体格检查，必须持有（）。
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You are working with CIS .com. who has identified the following IP applications on their network: IP voice and voice signaling, streaming video, PeopleSoft, Microsoft SQL, e-mail, and Internet traffic. If the voice traffic was classified as EF and AF31, the e-mail was classified as AF11, and the Internet traffic was classified as DSCP 0, how would the transactional traffic represented as PeopleSoft and Microsoft SQL be classified?（）
投资收益在国际收支平衡表中属于（）
脉冲喷射消防车上安装有脉冲炮，其原理是采用高压气体将水推出，所以其喷射的水雾粒子不均匀，水粒子大，有一定的冲击力。
关闭消防车上炮的控制阀，用消防水带将泵两侧（或一侧）的出水球阀和移动消防炮（枪）连接起来，打开出水球阀，驱动消防泵工作，灭火剂就会通过移动消防炮（枪）喷射出来。
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