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				| 1. | What are the values of current densities required in IBM? | 
| A. | 0.25 mA/cm<sup>2</sup> | 
| B. | 0.35 mA/cm<sup>2</sup> | 
| C. | 0.55 mA/cm<sup>2</sup> | 
| D. | 0.85 mA/cm<sup>2</sup> | 
| Answer» E. | |