The method and the condition of separation epoxy ethane from dihydric alcohol are described.介绍了环氧乙烷与二元醇的分离方法和条件.The Preparation method of cheap aluminium dihydric phosphate and its application in refractories have been i...
床单的边缘整整齐齐地掖在褥垫下面.The sheets were tucked in neatly, ie under the mattress.1928年有人把这些海豚象海狸那样把一床浸泡了水的褥垫推上岸时的情景拍摄了下来.In 1928 some porpoises were photographed working like beavers to push ashore a waterlogged mattress.此外, 文章还...