The golden bridge is a unique pedestrian bridge in which country?

Match these milestones in communication history with their correct dates. 1. telegraph 2. telephone 3. radio 4. computer 5. television 6. computer networking 7. internet

Which groups of people most directly benefited from song innovations in the song dynasty‘s open border policy?

What was the name of the theory that said that if one country in a region fell to communism, others would surely follow? 1) domino theory 2) arms race 3) brinkmanship 4) containment theory