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[问答题,简答题] 钢包透气砖不透气的原因是什么?

鉴定机构接到鉴定委托后,作出是否受理决定的时间是() ["3个工作日","5个工作日","7个工作日","14个工作日","30个工作日"] 蛔虫由虫卵发育为成虫的时间是() ["2~4周","5~8周","10~11周","2个月","1~2周"] 下列选项不是迟发性超敏反应引起的是() ["交感性眼炎","病毒性角膜基质炎","变应性眼睑水肿","角膜移植排斥反应","Vogt-小柳-原田综合征"] 将射线能量转换为可供记录的电信号的装置是() ["滤过器","探测器","准直器","A/D转换器","D/A转换器"] 胆道蛔虫症最常见临床表现类型是() ["胆绞痛型","急性胆管炎","急性胆囊炎","急性胰腺炎","重症梗阻型胆管炎"] 钢包透气砖不透气的原因是什么?
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