问题
连词成句
连词成句。
1. you, do, are, to, evening, this, going, what (?)
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2. by, am, I, going, train (.)
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答案
1. What are you going to do this evening?
2. I am going by train.
，X频段轨道测量精度会更高，也可使相应的星载设备体积小型化，有利于飞行器飞得更远。