题目内容
嘌呤核苷酸的合成顺序是，首先合成次黄嘌呤核苷酸，再进一步转化为腺嘌呤核苷酸和鸟嘌呤核苷酸
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It was reported that the earthquake was the most ____to have struck that area in fifty years.
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He was seriously injured in a car ____last year.
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