A、A.submerged rock，not dangerous to navigation
B、B.sunken wreck，not dangerous to navigation
C、C.towed-under buoy
D、D.All of the above
更多“A V-shaped ripple with the point of the V pointing upstream in a river may indicate a（）.”相关的问题
A、small whirlpool B、smooth patch of water C、V-shaped ripple with the point of the V pointing downstream D、V-shaped ripple with the point of the V pointing upstream
A、V-shaped ripple with the point of the V pointing upstream B、V-shaped ripple with the point of the V pointing downstream C、small patch of smooth water on a windy day D、smoothing out of the vessel's wake
A、V-shaped ripple with the point of the V pointing upstream B、V-shaped ripple with the point of the V pointing downstream C、small patch of smooth water on a windy day D、smoothing out of the vessel's wake
A、A.submerged rock, not dangerous to navigation B、B.sunken wreck, not dangerous to navigation C、C.towed-under buoy D、D.All of the above
A、T1WI低信号，T2WI高信号 B、T1WI高信号，T2WI低信号 C、T1WI和T2WI呈等信号 D、T1WI和T2WI呈低信号 E、T1WI和T2WI呈高信号，但T2WI信号有所衰减
A、T1WI低信号，T2WI高信号 B、T1WI高信号，T2WI低信号 C、T1WI和T2WI均呈低信号 D、T1WI和T2WI均呈等信号 E、T1WI和T2WI句呈高信号，但T2WI信号有所衰减
A、A.T1WI和T2WI均为低信号 B、B.T1WI为低信号，T2WI为高信号 C、C.T1WI和T2WI均为高信号 D、D.T1WI为高信号，T2WI为低信号 E、E.T1WI和压脂像均为低信号
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