特种设备使用单位应当对在用特种设备进行经常性日常维护保养，并定期自行检查。对在用特种设备应当至少（）进行一次自行检查，并作出记录。 ["每年","每半年","每季度","每月"]
You create a Data Collector Set (DCS).You need prevent the DCS from logging data if the server has less than 1 GB of available disk space. What should you do？（） [" Create a passive file screen."," Create an active file screen."," Modify the Data Manager settings of the DCS."," Modify the Stop Conditions settings of the DCS."]
论文摘要的基本四要素包括（）。 ["研究目的","研究方法","研究结果和结论"]
信息技术的开发和应用，涉及工程管理中的（）阶段。 ["分析","项目决策","实施","使用","准备"]
U/C矩阵的正确性检验没有包含的一种是：（） ["完备性检验","准确性检验","一致性检验","无冗余性检验"]
钱德拉塞卡极限
