With respect to requirements for ventilation and heating,which of the following are true:
A.sleeping rooms and mess rooms shall be adequately ventilated B.ships shall be equipped with air conditioning for seafarer accommodation no matter the temperate climatic condition requires or not C.all sanitary spaces shall have ventilation to the open air, independently of any other part of the accommodation D.adequate heat through an appropriate heating system shall be provided, except in ships exclusively on voyages in tropical climates正确答案ABD
