单项选择题
The notice of casualty to a vessel must include（）.
A.a request for assistance B.the location of the unit at the time of the casualty C.an estimate of the cost to repair damages D.the amount of fuel remaining
单项选择题 The Loran needs（）.
单项选择题 The equipment is very old．It’s not worth（）.
单项选择题 The deck control valve to be（）after being repaired.
