TN－C供电方式是（）制供电。 ["三相三线","三相四线","三相五线","安全电压"]
中国古代经典“三玄”指（）。 ["《老子》","《论语》","《孟子》","《庄子》","《周易》"]
依据《水利工程建设重大质量与安全事故应急预案》，（）是水利工程建设重大质量与安全事故应急处置的主体，承担处置事故的首要责任。 ["各级水行政主管部门","地方各级人民政府","水利部所属流域机构","水利部"]
Petroleum cargo tanks should not be topped off at deck level when loading on a cold day because（）. ["a subsequent temperature rise will cause the cargo to overflow","air pockets may cause the cargo to bubble out of the ullage hole","the increased viscosity of the product requires higher loading pressure which increases the chances of a spill","the tank valve may be stiff and a spill will occur before the valve can be closed"]
TN－C接地制式的中性线与保护线是（） ["分开","共用","前段共用后段分开","后段共用前段分开"]
印度的农业发展和布局有什么特点？
