【单选题】We can infer from the passage that the oldest form. of communication between people is ______.
【单选题】We can infer from the passage that the oldest form. of communication between people is ______.
【单选题】以下网络图中()以时间坐标为尺度进行绘制。
【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】由电阻元件经串、并联及混联组成的二端网络总可以等效为()。
【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.
D.
There is domestic commerce in the Atlantic Ocean.
【多选题】推进伟大事业,要求我们要更加自觉地增强( )。
【单选题】we can infer from the passage that the oldest form. of communication between people is ______.