单项选择题
A.week
B.month
C.three months
D.year
单项选择题 The lifeboats and liferafts were（）with the provisions of the regulations annexed to the Convention.
单项选择题 The knife on an inflatable liferaft will always be located（）.
单项选择题 The functioning of the radiotelegraph installations for motor lifeboats and/or the portable radio apparatus for survival craft，if provided，（）with the provisions of the regulations.