Which statements correctly describe the Shang dynasty?

Which economic sector employs the least number of people in mexico, barbados, and venezuela? a. agriculture b. services c. industry

What event started the space race and made americans feel their security was threatened a.) alan shepard's suborbital flight. b.) the launch of sputnik c.) the launch of explorer d.) the cuban missle crisis

The information box says that the han added 4,000 miles of wall. refer to the mileage scale. how can this be true?