

MCQOPTIONS
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1. |
Depending on the mission profile, the most economical number of steps / expended stages for a multistage rocket is between _____ and ______ |
A. | 2, 10 |
B. | 4, 9 |
C. | 2, 6 |
D. | 4, 7 |
Answer» D. 4, 7 | |