【简答题】(1) Rayon is the oldest manufactured fiber, having been in production since the 1880s in France, where it was originally developed as a cheap alternative to silk. Rayon ds well, easy to dye, and i...
【简答题】The Northest region consists of 11 states and the nation's capital,________. 2.______ is the oldest steel industrial center of the USA. 3. Known as the "melting pot", the Northeast of the USA reflects...