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全封闭防化服，主要适用于消防员在化学危险品、()、有毒气体的事故现场抢险救援是穿戴的全密封防护服装。
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______was between House of Lancaster and House of York and resulted in the House of Tudors.
Professor Plumb has just invented a highly concentrated form. of food. All the essential nutritive elements are put together in the form. of pellets which, diluted with water, will form. all that is necessary to support life. The Professor looks forward confidently to revolutionising the present food system. Now this kind of thing may be all very well in its way, but it is going to have its drawbacks as well. In the bright future anticipated by Professor Plumb, we can easily imagine such incidents as the following: The smiling family were gathered round the hospitable board. The table was plenteously laid with a soup-plate in front of each beaming child, a bucket of hot water before the radiant mother, and at the head of the board the Christmas dinner of the happy home, warmly covered by a thimble and resting on a poker chip. The expectant whispers of the little ones were hushed as the father, rising from his chair, lifted the thimble and disclosed a small pill of concentrated nourishment on the chip before him. Christmas turkey, cranberry sauce, plum pudding, mince pie—it was all there, all jammed into that little pill and only waiting to expand. Then the father with deep reverence, and devout eye alternating between the pill and heaven, lifted his voice in a benediction.
唐玄宗统治时期，中国出现了_____。
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