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Building Materials - Section 7 :: Discussion
| 14. | Asbestos | |
| A. | is a natural fibrous mineral substance | |
| B. | is composed of hydrous silicates of calcium and magnesium (CaSiO3, 3MgSiO3) | |
| C. | contains iron oxide and alumina | |
| D. | all the above. | |
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