[多选] 高层建筑热水供暖系统的常见型式有（）。

集贸市场内从事零售的经营者在经营过程中应做到（） 应当建立食用农产品进货台账。 应当建立食用农产品销货台账。 索取有关产品检疫证。 索取产品质量合格证。 依据华电集团《电力安全工作规程》（热力和机械部分），值长的安全职责是什么？ 支行行政主管和业务主管是否可以兼任其他操作级别？ 班级危机管理可大致分成哪几个阶段？ Which statement concerning reserve sources of energy for GMDSS is FALSE（）. While the ship is at sea，there must be available at all times a supply of electrical energy sufficient to operate the radio installations and to charge any batteries used as part of a reserve source of energy。 Both the VHF and MF/HF installations must be simultaneously supplied。 A means of ensuring a continuous supply of electrical power must be provided to all GMDSS equipment that could be affected by an interruption in power。 If a UPS or equivalent is used to supply power to the ship's GPS receiver or other source of positional information，a means must be provided to ensure the continuous supply of the information in the event of a failure to the ship's main or emergency source of power。 高层建筑热水供暖系统的常见型式有（）。