单项选择题 No jettison of cargo shall be made fair as（）unless such cargo is carried in accordance withthe recognized custom of the trade.

单项选择题 No jettison of cargo shall be made（）as general average unless such cargo is carried in accordance with the recognized custom of the trade.

单项选择题 Measures taken by the Assured or the Underwriters with the object of saving，protecting or recovering the subject-matter insured shall not be considered as（）.