总行根据总行级重点客户发展前景、合作层级与合作前景，在将总行级重点客户划分为A、B类客户的基础上，进一步细分为（） ["总A战略客户","总A骨干客户","总B战略客户","总B骨干客户"]
圆钢在地下作接地线时，其最小直径应为（）毫米。 ["5","6","8","10"]
An azimuth angle for a body is measured from the（）. ["observer's meridian","Greenwich meridian","body's meridian","zenith distance"]
通常零线表示（）尺寸。 ["作用","实体","基本"]
钢管做人工接地体时，壁厚不小于（）毫米。 ["2","2.5","3.5","5"]
海洋对世界生产力布局有什么重要影响？
