单项选择题
The Purchaser shall（），prior to the ship’s departure，the invoiced amount at the rate of exchange applicable on the day of payment.
A.give B.pay C.have D.make
单项选择题 The latest edition of ISSA Ship Stores Catalogue is（）.
单项选择题 On a ship，each emergency generator must be tested at least once each（）.
单项选择题 Kort nozzles are installed around the propellers of some vessels to（）.
