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				| 1. | In how much time does the earth make one revolution on its axis? | 
| A. | 23 hours, 59 minutes and a few seconds | 
| B. | 22 hours, 16 minutes and a few seconds | 
| C. | 24 hours, 36 minutes and a few seconds | 
| D. | 23 hours, 56 minutes and a few seconds | 
| Answer» E. | |