Trắc nghiệm: In the fourteenth century. ______ that glass coated with silver nitrate would turn yellow when fired in an oven. | Gửi trắc nghiệm |
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Trắc nghiệm: In the fourteenth century. ______ that glass coated with silver nitrate would turn yellow when fired in an oven. | Gửi trắc nghiệm |