What is the best gift for the French on February 14?
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该施工单位进行土方回填工作时应当把握哪些施工质量控制要点?
请结合给定资料1和2,概括目前我国产业结构存在的问题及其原因。
要求:语言精练,层次要点清楚,字数不超过300字。
The system blocks calls when ______.
Besides the way of threading an ultra thin wire with blood-flow sensors, another noninvasive way of detecting micro-vascular disease is to use______.