中文说明：A题第一问切题论文，绝对符合
English Description：
The first question of question a is related to the topic of the paper
The first question of question a is related to the topic of the paper
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中文说明：A题第一问切题论文，绝对符合
English Description：
The first question of question a is related to the topic of the paper工业CT系统旋转中心定位方法研究_刘明进.caj
空洞探测问题及有关情况_关信.caj