Later a different kind of trade in the form of transportation, c

Later a different kind of trade in the form of transportation, communication, banking, insurance, consulting, information etc. gradually became more and more important. This type of trade is called ______.
A、visible trade
B、invisible trade
C、domestic business
D、international investment
【正确答案】：A
【题目解析】：Later a different kind of trade in the form of transportation, communication, banking, insurance, consulting, information etc. gradually became more and more important. This type of trade is called invisible trade.参见教材P4。