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The coronavirus （COVID-19） pandemic severely disrupted travel and tourism， and recovery is now expected to be slower than p......
目的比较翼状胬肉切除术后应用两种糖皮质激素滴眼液的效果。方法回顾性分析2016年3月至2017年2月在大庆油田总医院治疗的原发性翼......
一说起好吃的、好喝的,同学们个个喜欢。可是你知道吗,在英语中,许多表示吃的和喝的单词,它们在有的句子中不再与吃喝有关。不信请......
The experiments were carried out to measure the mechanical properties of three grades of structural steels (Q235A, 16Mn......
