单项选择题
A.Carefully and neatly erase the entry and rewrite it correctly
B.Cross out the error with a single line，write the correct entry，and initial it
C.Blot out the error completely and rewrite the entry correctly
D.Remove this page of the log book and rewrite all entries on a clean page
单项选择题 If your passenger vessel is fitted with a loudspeaker system，it must be tested at least once （）.
单项选择题 Functions aboard a tanker or tank barge such as connecting，disconnecting，and topping off must be supervised by（）.
单项选择题 At 0900，you take the following radar ranges: Watch Hill Point 5.4 miles; Block Island Grace Point 8.3 miles. Which statement is TRUE? （）