Exterior Placards and Markings are required for ground servicing instructions, inspections, cautions and warnings.
A.Exterior Plates and Signs are required for ground servicing instructions, checks, warnings and cautions. B.External Placards and Symbols are necessary for ground servicing instructions, inspections warnings and cautions. C.. Internal Plates and Markings are required for ground servicing instructions, reviews, 'warnings and cautions.正确答案A
