利用高浓度的盐水杀菌的原理是（） A.钠离子有杀菌作用 B.盐水

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问题单项选择题

利用高浓度的盐水杀菌的原理是（）

A.钠离子有杀菌作用

B.盐水中的氯离子有杀菌的作用

C.细菌由于脱水而死亡

D.高浓度盐水中水分不足，不利于细菌生长

答案

参考答案：C

解析：试题分析：在高浓度盐水环境中，细菌会由于细胞渗透作用失水过多，而导致死亡；故选C。考点：渗透作用。

改错题

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单项选择题

PTSD的临床主要表现错误的是（）

A.闯入性再体验

B.警觉性降低

C.回避

D.麻木