How are the speeds (shown in the figure) at point 1 and point 2 related to the relative wind/airflow V?
A、V1V2andV2V
B、V1=0andV2>V
C、V1>V2andV2V
D、V1=0andV2=V
发布时间：2025-11-24 19:16:26
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答案：B
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