What was a required study for those who wished to pass the civil service exam during the Tang Dynasty?

Review the image below. which answer best describes how the artist depicts the people in this poster? the woman is not prepared while her husband is in control. the woman is upset about leaving her children, but her children are happy. the woman is prepared to leave, but her husband is worried. the woman, her husband, and her children are all angry about the situation.

What from the columbian exchange had perhaps the biggest impact on the world?

The soviet union and the united states believed in two very different economic systems. what were the names of each?