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【简答题】
亮亮做家务时接触到下列用品. 用品 脱氧剂 洁厕灵 炉灶清洁剂 有效成分 还原铁粉 盐酸 氢氧化钠 ( 1 )他清理垃圾时发现一袋脱氧剂,拆开后看到还原铁粉已生锈,铁生锈的原因是 。 ( 2 )他选用洁厕灵清除水垢(主要成分是碳酸钙),用化学方程式表示其原理 。 ( 3 )他清洗炉灶时戴上橡胶手套,以防清洁剂与皮肤直接接触,其原因是 。 ( 4 )做完家务,他用 Vc 泡腾片冲了一杯饮料.下列 Vc 泡腾片的主要成分中,属于有机物的是 (填字母序号)。 A .维生素 C ( C 6 H 8 O 6 ) B .柠檬酸( C 6 H 8 O 7 ) C .碳酸氢钠( NaHCO 3 )
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【单选题】下列情况属于医院感染（ ）
A.
皮肤黏膜开放性伤口只有细菌定植而无炎症表现
B.
由于创伤或非生物性因子刺激而产生的炎症表现
C.
新生儿经胎盘获得(出生后48h内发病)的感染，如单独疱疹、弓形体病、水痘等
D.
病人原有的慢性感染在医院内急性发作
E.
医院工作人员在医院内获得的感染
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