In 1999, portugal returned what small region, in the south china sea west of hong kong, back to the chinese?

The supreme court serves what important function in the u.s. federalgovernment?

When a county and a city work together to run a school district, they have organized a

What is the main difference between primary and secondary sources? a. primary sources are historical documents, and secondary sources are modern-day documents. b. primary sources are derived from museums and archives, and secondary sources are created by history students and academics. c. primary sources are found in ancient places with a rich history, and secondary sources are found in historical journals and blogs. d. primary sources are created during a particular historical era, and secondary sources are created by studying primary sources.