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| 1. |
The number of red blood corpuscles in one cubic millimeter is about 5,000,000, and the number of white blood corpuscles in one cubic millimeter is about 8,000. What, then, is the ratio of white blood corpuscles to red blood corpuscles? |
| A. | 1:625 |
| B. | 1:40 |
| C. | 4:10 |
| D. | 5:1250 |
| Answer» B. 1:40 | |