【简答题】Barter trade is the oldest form of trade, which is a direct exchange of one goods for another deemed to be of approximately equivalent value without any flow of money taking place. It is a primitive w...
【单选题】Water is the oldest form. of transport. The original sailing vessels were replaced by steamboats in the early 1800s and by diesel power in the 1920s. A distinction is generally made between deepwater ...
A.
Steamboats are the original sailing vessels.
B.
Steam power followed diesel power.
C.
Deepwater and navigable inland water transport are equivalents.