When the mode of operation is production at a constant surface pressure, we can assume that the flow rate is changing slowly and smoothly.
举一反三
- The venturi tube can be used to measure ( ) A: Point velocity B: Point pressure C: Average velocity across section D: Flow rate
- when a transistor is in the forward-active mode, the collector current is constant with a constant base current
- In the process of well testing, every measured pressure and production does not change with time is() A: steady-state well testing B: unsteady test C: Pressure well test D: Constant pressure production well test
- When we listen, flow of speech can be divided into, then our brain to convert these into meaningful information. （ ）
- According to what we learn ,which one is right? () A: on<br/>the operation time we can touch the hair B: on<br/>the operation time we can touch the operation field C: on<br/>the operation time we can touch the floor D: on<br/>the operation time we can touch the back said