["일일 문제』 이론적 기초2"
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["选择题 ：안정된 유체의 연속성 방정식과 베르누이 방정식에서 유속은 （ ） A. 단면 평균 유속 B. 단면面上的最大流速 C. 단면 형심점에서의 유속 D. 단면 압력 중심점에서의 유속 답변：A 팁시：답 pérdida 확인可见
"单面平均流速"
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