What were the results of the acoustical simulation? Why are these results significant? The Boston massacre

According to the qianlong emperor, why was china not interested in importing anything else?

Which of the following is an example of the pull factor known as economic migration? a. better educational opportunities pulling people towards a new country b. mexican laborers entering the us to work in agricultural jobs c. joining family members that are already in a new country d. crop failures driving people away from their country i am unsure on this question, i was thinking b? but i could be wrong.

How do you think entrepreneurs contribute or industry in america? describe your answer.