¿Cuan efectivos son los acuerdos internacionales en la defensa de la diversidad cultural?

Ateam of scientists studied the sediment at the bottom of an ancient lake. they were able to determine the weather conditions of the indus valley in ancient times. they found that the entire area had suffered a drought after the monsoons declined. this drought lasted 200 years. because of the drought, there wasn’t enough food or water. the people of the indus valley were forced to leave their cities.

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

Which of these belongs to the united states after the spanish american war ?