A cardinal mark showing an uninterrupted quick-flashing white light indicates the deepest water in the area is on the ______.
A.north side of the mark
B.west side of the mark
C.east side of the mark
D.south side of the mark
正确答案：A
当方位标显示不间断的快闪白灯表示该区域的最深处在标志的北面
