Each part of the fire-main system located on an exposed deck must be().
A. protected against freezing
B. locked to prevent theft
C. numbered sequentially
D. pressurized at all time
发电机屏定子电流表是从哪儿接的,CT安装位置、变比多大?
日常申报中正常申报时,“税款类型”下拉列表框有以下哪些类型()
A. 正常申报
B. 自核自缴申报
C. 纳税评估申报
D. 约谈稽查申报
砌碹施工时,为防止未砌的顶邦岩石垮落,必须架设临时支架,临时支架应选用()为优选。
A. 木梁无腿棚
B. 树脂锚杆
C. 金属拱型架