单项选择题
A.Radio Dalian
B.Radio Guangzhou
C.Radio Singapore
D.Radio Bangkok
单项选择题 No navigational aids are shown and chart is not kept（）for alterations in depths inside the pecked lines joining Hurst pt. to Warden pt.
单项选择题 No navigational aids are shown and chart is not kept corrected for alterations in depths inside the pecked lines. For more detailed information, the larger scale charts must be（）.
单项选择题 No navigational aids are shown and the chart is not kept corrected for alterations in depths inside the pecked lines. For more detailed information, the larger scale charts must be（）.