How did rivers enable the early chinese to give up their nomadic existence.

Greg goes to a high school and observes the way students talk to each other. he makes notes on the words used, the atmosphere of the school and the way the students present themselves to each other. this is an example of a( research method.

Restricting immigrants from entering a country may be based on what belief?  

At 3476 kilometer the moon's diameter is slightly less than the distance across from what