【简答题】单位时间内流过管道某一截面的液体体积称为()
【单选题】流体在单位时间内流过管道某一截面的体积数或质量数称为
【简答题】单位时间内通过管道某一截面的体积数或质量数称为流体的 ,一段时间范围内通过管道某一截面的体积数或质量数的总和称为流体的 。
【单选题】internal combustion engine technology
【单选题】Modern marine diesel engines equipped with mechanical fuel injection operate on a combustion phase within the cycle which is ______.
A.
entirely constant pressure
B.
entirely constant temperature
C.
a combination of constant volume and constant pressure
D.
a combination of constant temperature and constant pressure