A device used to enlarge the size of an existing bore hole, having teeth arranged on its outside circumference to cut the formation as it rotates is a (n)（）. ["enlarge bit","casing bit","hole opener","casing opener"]
在外电架空线路附近开挖沟槽时，应采取（），防止外电架空线路电杆倾斜、悬倒。 ["防护措施","安全措施","隔离、警示措施","加固措施"]
客户/账户信息查询交易（60450）中需要授权吗（）。 ["需要授权","不需要授权","需要一定级别的柜员授权"]
个人住房贷款额度最高不得超过房价的（） ["60％","70％","80％","90％"]
架设防护设施时，应采用线路暂时停电或其他可靠的安全技术措施，并应有（）监护。 ["班组长","电气专业技术人员","专职安全人员","电气专业技术人员和专职安全人员"]
浮筒式液位计的连接方式是什么？
