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| 1. |
At what temperature are the liquid oxygen and the liquid hydrogen kept in their storage tanks of the cryogenic rocket engine? |
| A. | -253°C and -183°C |
| B. | -183°C and -253°C |
| C. | -253°C for both |
| D. | -183°C for both |
| Answer» C. -253°C for both | |