【单选题】【消耗次数：1】
The car accident happened_______a spring morning.
①
at
②
on
③
in
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相关题目
【单选题】
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possibly
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He____________ working as if nothing had happened.
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continue
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随机题目
【单选题】
某工程在进行水准测量时，按规范计算出的高差闭合差的容许误差为28mm，而以观测结果计算出的实际高差闭合差为-0.026m。说明该水准测量的外业观测有错误。
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【单选题】
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