Which of the following is not a main flow of the supply chain? （ ） A: Finances flow. B: Product flow. C: Staff flow. D: Information flow.

Cross-border E-commerce _______ logistics, information flow, capital flow, and document flow.

Every transaction in electronic commerce includes information flow, commercial flow, （） and material flow. A: merchandise flow B: data flow

The three main flows of the supply chain are the product flow, the information flow and the staff flow.（ ）

According to the different causes, gap flow can be divided into three types: differential pressure flow, shear flow and ( ) flow.

Haier's one flow is stock-centered information flow.

According to whether the moving elements change with time, the flow is divided into uniform flow and non-uniform flow.

Dream is another kind of flow. （ ）

Most human communication is a one-way 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