在渐变流的同一有效截面中，流体的压强分布满足    。

A、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/ueditor/jsp/upload/image/20151119/1447905581339056350_blob.png" title="8538605492751925" alt="blob.png"/>

B、<span style="font-size:16px;font-family: &#39;Times New Roman&#39;">p=C&nbsp;</span>

C、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/ueditor/jsp/upload/image/20151119/1447905595762077317_blob.png" title="883230550193529" alt="blob.png"/>

D、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/ueditor/jsp/upload/image/20151119/1447905605191050548_blob.png" title="5161839992442302" alt="blob.png"/>