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。
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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______.
The speaker believed the reporter wanted a picture of her looking
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