What does an archer draw back to launch an arrow?

An APR, or annual percentage rate, expresses the yearly rate of what on a loan or credit card? An April 1971 visit to China by a U.S. team in which sport helped thaw relations between the two countries? An arbalest is which kind of archery weapon? Which Konami arcade game, known as DDR, has players stomping on arrow panels in time with music? Which Nazi architect and armaments minister wrote the memoir "Inside the Third Reich"? Which Paris school gave its name to an ornate architectural style, though it dropped architecture teaching in 1968? What is the wedge-shaped stone at the top of an arch that locks the other stones in place? Which piano virtuoso and ardent Polish patriot served as Poland's prime minister in 1919?