Trắc nghiệm: Nylon. a synthetic. make from a combination of water and a by-product of coal. was first introduced in 1938. | Gửi trắc nghiệm |
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Trắc nghiệm: Nylon. a synthetic. make from a combination of water and a by-product of coal. was first introduced in 1938. | Gửi trắc nghiệm |