单项选择题
Navigational warnings and weather bulletins for shipping（）from Singapore Radio.
A.broadcast B.broadcasted C.are broadcast D.are broadcasted
单项选择题 （）is the system for the broadcast and automatic reception of maritime safety information by means of narrow-band direct-printing telegraphy.
单项选择题 The fog most commonly encountered at sea is called（）.
单项选择题 The Daily Memorandum contains information on（）.
