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Glass is made of mixture of many substances melted together in a large furnace. The most important substance is silica which is
Glass is made of mixture of many substances melted together in a large furnace. The most important substance is silica which is
admin
2009-05-28
39
问题
Glass is made of mixture of many substances melted together in a large furnace. The most important substance is silica which is found in sand. Potash (钾碱), obtained from wood-ashes, is also necessary. To these two substances are added lime, lead, soda
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答案
backwards and forwards
解析
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本试题收录于:
大学英语三级B级题库大学英语三级分类
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大学英语三级B级
大学英语三级
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