统计研究的过程通常包括（）。 ["A.数据管理","B.数据收集","C.数据监督","D.数据整理","E.数据分析"]
A wildcat ia a（）. ["deeply-grooved drum on the windlass with sprockets with engage the links of the anchor chain","winch that running out of control due to a failure of the overspeed trips","line that has jumped off the gypsyhead while under strain","nylon line that parts under strain and whips back in a manner"]
根据《电力建设安全工作规程第2部分：电力线路》（DL5009.2-2013）规定，人工挖孔桩施工人员应用（）上下。 ["人字梯","爬梯","竹梯","软梯"]
重要空白凭证状态变化中记账传票属于（）状态。 ["未用","使用","在途","收回"]
最早使用移动闭塞技术之一的（）无人驾驶轻轨系统至今已安全运行近20年，充分验证了移动闭塞的安全性以及技术的成熟性。 ["广州","伦敦","温哥华","纽约"]
涡轮流量变送器的仪表常数是在什么状态下标定的？
