1925年10月2日英国发明家贝尔德发明电视John Logie Baird was a Scottish engineer and inventor of the world’s first working(可行的) television system. In his laboratory on October 2, 1925,
1988年12月1日第一个世界艾滋病日World AIDS*Day was originally organized by UNAIDS(联合国艾滋病规划署),who chose the theme after consultation with other organizations.In 2005 UNAIDS handed over responsibility for World ...1988年12月1日第一个世界艾滋病日World AIDS*Day was originally organized by UNAIDS(联合国艾滋病规划署),who chose the theme after consultation with other organizations.In 2005 UNAIDS handed over responsibility for World AIDS Day to an independent organization展开更多
文摘1925年10月2日英国发明家贝尔德发明电视John Logie Baird was a Scottish engineer and inventor of the world’s first working(可行的) television system. In his laboratory on October 2, 1925,
文摘1988年12月1日第一个世界艾滋病日World AIDS*Day was originally organized by UNAIDS(联合国艾滋病规划署),who chose the theme after consultation with other organizations.In 2005 UNAIDS handed over responsibility for World AIDS Day to an independent organization
