单项选择题
A.The appliance should be tested every three months
B.A regular service line should be used when testing
C.A regular projectile should be used when testing
D.An entry about the test must be made in the Official Log Book
单项选择题 Under the Pollution Regulations，when you dump garbage in to the sea you must（）.
单项选择题 Uncleared crew curios remaining on board during a domestic coastwise voyage after returning from foreign should be（）.
单项选择题 The responsibility for maintaining the Official Logbook on voyages between the Atlantic and Pacific coasts of the United States rests with the（）.