题文
_______ the pull of the earth, a rocket must reach a speed of 28440 km/h.
| A．In order to flee | B．So as to escape |
| C．To escape | D．So that to flee |
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_______ the pull of the earth, a rocket must reach a speed of 28440 km/h.
| A．In order to flee | B．So as to escape |
| C．To escape | D．So that to flee |
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