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电力牵引供电系统由哪几部分组成?
男性,40岁,2年来阵发性心悸,2小时前又发作,心电图可见连续出现的快速的QRS波群,QRS波群形态与时间正常,其前后未见P波,节律完全规整,频率为180次/分,ST段稍下移,应诊断为()
所有液压系统必须装有()。
下列关于制备煎膏剂过程中炼糖目的的叙述,错误的是()
请从所毁、能毁、摧毁方式这三方面,具体分析“一嗔能摧毁,千劫所积聚,施供善逝等,一切诸福善”。
目前已知的维生素A原是()
企业在材料收入的核算中,需在月末暂估入账并于下月初红字冲回的是()。
幼儿健康行为的形成,教育幼儿养成对健康有益的行为习惯是幼儿健康教育的()目标。
沉积相的含义是什么,山西组地层和太原组地层分别是什么沉积相?
在上皮棘层或基底层,个别或一群细胞发生角化称为( )。
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