A、<span style="font-family: 宋体;">临界弗汝德数</span>
B、<span style="font-family: 宋体;">临界欧拉数</span><span style="font-family: 'Times New Roman';"> </span>
C、<span style="font-family: 宋体;">临界雷诺数</span>
D、<span style="font-family: 宋体;">临界马赫数</span>