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以下哪些情况可能会造成公安内网计算机无法上网（）。
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Choose the best words into the sentences. Sudan is the only male northern white rhino (犀牛) left in the world. That (mean) Sudan, 42, is the last hope for avoiding extinction. (protect) him, officials have placed him under 24-hour armed guard at the OI Pejeta Conservancy in central Kenya. Sudan lives there two female northern white rhinos, Fatu and Najin. Northern white rhinos, can weigh up to 5,000 pounds, were once plentiful across northern and central Africa. (hunter) have killed thousands of rhinos because of high demand for the animals，horns (角). Rhino horns, believed to have medical effects, are used in (tradition) Asian medicines. More than 1,000 rhinos (kill) in 2014 in South Africa alone and fifty-four rhinos in Kenya, which has a much (small) population. Sudan, Fatu, and Najin have had their horns (remove) so that they will not be hunted. People hope Sudan and one of the females will be able to have a baby. Sudan is very old, but scientists will not give up hope.
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用雷达探测雨雪区域中的物标，FTC及增益钮的正确用法是（）。
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某货轮进行营运检验中发现，其左舷设有1艘救生艇，右舷1只救生筏，救生艇和救生筏总承载人数是证书中船员总数的1.5倍。该船2007年3月1日安放龙骨，船长93米，航区为近海。验船师认为该船救生设备配备不满足法规要求，以下的说法正确的是：（）
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在活塞式压缩机的理想工作过程中，其中有一个过程结束时，气缸的容积为零。这个过程是（）。
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在变量数列中，若标志值较小的组其权数较大，则计算出来的平均数（）
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《建筑法》的规定，工程监理单位()转让工程监理业务。
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静电电压不会很高，不会引起人身触电。
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平衡记分卡能够帮助企业有效地解决一些关键问题，如企业( )。 A．绩效考评 B．员工招聘配置 C．员工薪酬 D．员工培训开发 E．战略实施
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乐当家理财卡在美国银行ATM仅免取现手续费。（）