"Practice 1 Solid-Fuel Rocket and Liquid-Fuel Rocket
Practice 2 Statistics:Its Development and Use
Practice 3 Anglo Patrons'' Influence on Hispanic and American Arts
Practice 4 How Do Americans Become Wealthy?
Practice 5 Oil Industry in Today''s Norway
Practice 6 Cacti
Practice 7 Erosion:How to Do wit It
Practice 8 Animals Need Protecti
N_Practice 9 Herodotus-A Greatest Tourist
Practice 10 Railroad Building in the 19th US
Practice 11 Study of Hurricane
Practice 12 Methods of Children''s Educati
N_Practice 13 UFO
Practice 14 Tunnel Building in New York
Practice 15 G.W.Carver:His Work and Career
Practice 16 Southeasterners''Views on Universe
Practice 17 A Portrait of Grandma Moses
Practice 18 Two Men in Henry''s Lunch-Room
Practice 19 World''s Wild Areas
Practice 20 Construction, Savings and The Stock Exchange
……"