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【简答题】
在S系中观察到在同一地点发生两个事件，第二事件发生在第一事件之后2s。在S'系中观察到第二事件在第一事件后3s发生。求在S'系中这两个事件的空间距离。
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got the father
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A.
since
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B.
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close; was about to win
【简答题】My name is Jack. I am a pupil of Grade One. I’m in No.1 Middle School. On weekdays I get up at six o’clock. I have breakfast at seven and then I go to school by bike. We begin our class at eight o’clo...
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thanks to
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but for
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A.
supposed
B.
being supposed
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supposing
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to suppose
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