According to the different causes, gap flow can be divided into three types: differential pressure flow, shear flow and ( ) flow.
举一反三
- According to whether the moving elements change with time, the flow is divided into uniform flow and non-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
- The three main flows of the supply chain are the product flow, the information flow and the staff flow.（ ）
- 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
- Every transaction in electronic commerce includes information flow, commercial flow, （） and material flow. A: merchandise flow B: data flow