If a rocket can't speed of 28,440 km/h, it will fall back to the earth. [ ] A.ar
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![If a rocket can't speed of 28,440 km/h, it will fall back to the earth. [ ] A.ar](/pic/43_978122.jpg)
If a rocket can't ________ speed of 28,440 km/h, it will fall back to the earth.
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A.arrive atB.reach the C.reach aD.get to a试题答案
答案:C