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
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
A
举一反三
- Which of the following describes the two typical methods for material anthropogenic flow analysis A: The dynamic method tracing material flow process and the STAF method focusing on the specific area B: The mass conservation method and the statistical analysis method C: Material flow analysis method and life cycle analysis method D: Bottom-up method and top-down method
- Every transaction in electronic commerce includes information flow, commercial flow, （） and material flow. A: merchandise flow B: data flow
- In a study of material in-use stock, the bottom-up approach requires a material flow analysis, while the top-down method needs to count the quantity of material products
- 物流对应的英语应该是 A: material flow B: product flow C: logistics D: radio frequency identification
- In a study of material in-use stock, the bottom-up approach requires a material flow analysis, while the top-down method needs to count the quantity of material products A: 正确 B: 错误
内容
- 0
According to the different causes, gap flow can be divided into three types: differential pressure flow, shear flow and ( ) flow.
- 1
According to whether the moving elements change with time, the flow is divided into uniform flow and non-uniform flow.
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An opaque material is （） A: a material that can be seen through B: a translucent(半透明的) material C: a material that can not be seen through D: a lucent material
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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
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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