A: By adding a sink to a uniform flow
B: By adding a vortex to a uniform flow
C: By adding a source to a uniform flow
D: By adding a source and a sink
举一反三
- According to whether the moving elements change with time, the flow is divided into uniform flow and non-uniform flow.
- What best describes the normal blood flow to the lungs in a supine patient? （ ） A: largely uniform B: decreased flow to apices relative to bases C: increased flow to upper lobes
- In the pipe flow, the cross-section velocity distribution of laminar flow conforms to （ ） A: Uniform law B: Law of linear change C: Parabolic law D: Law of logarithmic curve
- When roughing cast iron, the mainly cooling cutting fluid should be added with sufficient and uniform flow .
- Three types of flow regimes are steady-state flow, __ to describe the fluid flow behavior and reservoir pressure. A: Radical flow B: Unsteady-state flow C: Pseudosteady-state flow D: linear flow
内容
- 0
If<br/>the Reynold’s number of blood flow is 3500, then the flow<br/>will be A: laminar<br/>flow B: idea flow C: turbulent flow D: smooth flow
- 1
The material flow can be divided into the following ( ) two categories according to whether the material flow is mainly caused by human activity A: Material biogeochemical flow and its anthropogenic flow B: Material flowing with the atmosphere and with the water body C: Material industrial and agricultural flows D: Material industry flow and consumption flow
- 2
Slug flow is the most efficient flow pattern in two-phase flow
- 3
What are the three main processes of supply chain management? A: Product flow B: Information flow C: Financial flow D: Business flow
- 4
Every transaction in electronic commerce includes information flow, commercial flow, （） and material flow. A: merchandise flow B: data flow