发生水击现象的物理原因主要是由于液体具有惯性和压缩性。
查看答案
并联管路各管段的水头损失不相等。
A. 对
B. 错
紊流射流的动力特征是各横截面上的动量相等。
A. 对
B. 错
Complete the following sentences with the words in brackets. Change the form if necessary.1) If this issue cannot be solved properly, it may affect the long-term _______ of the overall economic development. (sustainable)
Now that two of her three successors have been female, the phrase “Madam Secretary” is no longer a _____.(novel)