单项选择题 Which factor(s) might indicate that a towline should be removed from service? （）

单项选择题 Where the contract is to insure the subject-matter at and from，or from one place to another or others，the policy is called a（）.

单项选择题 When the carrier is liable for the compensation in respect of loss of or damage to the goods，such compensation shall be calculated on the basis of the Merchant’s net invoice cost，plus freight and insurance premium，if paid. This sentence means that（）.