An anemometer on a moving vessel measures（）.<br>A:apparent wind speed only<br>B:true wind speed and true wind direction<br>C:true wind speed only<br>D:apparent wind speed and true wind direction

An anemometer on a moving vessel measures（）.
A:apparent wind speed only
B:true wind speed and true wind direction
C:true wind speed only
D:apparent wind speed and true wind direction

出自：海船船员证

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