()在整个跨境电子商务中的比重最大,约占整个电子商务出口的90%。()虽只占跨境电子商务总量的10%左右,但却是增长最为迅速的部分。
A、B2B,B2C
B、B2C,B2B
Foreign exchange markets are electronic communication systems that (56) major financial centers throughout the world. Exchange rates are determined (57) supply and demand relationships, relative interest rate levels, relative (58) of inflation, political risk, and economic risk. Alternatives (59) affecting settlement of purchase and sales claims were explored (60) with the instruments available to exporters and importers for financing their international activities.
(41)
A.focus
B.liaison
C.connect
D.associate
关于无铰拱桥试验荷载工况的确定,下列哪个说法是错误的()A跨中最大正弯矩工况
B拱脚最大正弯矩工况
C拱脚最大推力工况
D正负挠度绝对值之和最大工况