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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 | |