■The twentieth century saw more technological invention and creation than any other period in the proceeding two thousand years.As a result,human activity has flourished and our lives have become richer and more colo...■The twentieth century saw more technological invention and creation than any other period in the proceeding two thousand years.As a result,human activity has flourished and our lives have become richer and more colorful than ever.展开更多
文摘■The twentieth century saw more technological invention and creation than any other period in the proceeding two thousand years.As a result,human activity has flourished and our lives have become richer and more colorful than ever.
