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1. |
One cubic metre of bone can treat how much quantity of water containing 3.5 ppm of fluoride?$ |
A. | 10m<sup>3</sup> |
B. | 100m<sup>3</sup> |
C. | 1000m<sup>3</sup> |
D. | 10000m<sup>3</sup> |
Answer» C. 1000m<sup>3</sup> | |