They isolated the area of China from outside places preventing things like invasion and impeded cultural diffusion and trade to a degree. Its one of the reason China holds a xenophobic attitude because it was created in relative isolation and its natural forms allowed it to be isolated so it helped to reject outside culture.
Answer: The most common unit is the watt (W), defined as 1 joule (J) of energy per second.
I do not know if this answer this question but I try my best
Explain please... 700 what?
Answer: The Germans moved all their troops to the front on the border of France
Explanation:
