题目内容
_____ had been used in the front of costumes for several thousand years before the Ming dynasty.
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The four most famous types of embroidery in China are Sichuan embroidery, Suzhou embroidery, Hunan embroidery and _______ embroidery.
When a girl is born into a Miao family, her parents will save on food and expenses______ so as to purchase a complete set of for her.
康普顿散射实验的意义
1922-1923年康普顿研究了X射线被较轻物质(石墨、石蜡等)散射后X光的成分，发现散射谱线中除了有波长与原入射X波长相同的成分外，还有波长较长的成分。
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