要对实验室内的空间及表面进行消毒可采用哪些消毒方法？如何评价你所采用的消毒剂对空气中微生物的杀灭效果？（25分）
参考答案：方法：紫外线照射；化学药物：喷雾（0.2%过氧乙酸、1%漂白粉澄清液……），气体熏蒸（福尔马林等）。检测杀灭效果：将制备好的普通营养琼脂平板，于消毒前和消毒后分别放于室内的4角和中央，暴露采样15 min，然后放培养箱培养24-48h，观察结果。对消毒前、后各5个板，分别求其平均菌落数及计算杀灭率。
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| A little boy 1 afraid of the dark. One night his mother told him to go out to the backroom 2 bring her the broom. The little boy turned to his mother and said, "Mom, I don't want to go out there. It's very 3 ." The mother smiled at her son and said, "You don't 4 be afraid of the dark. Jesus is out there. He'll look after you and protect you. " The little boy looked at his mother and asked, "Are you 5 he's out there?" "Yes. He is 6 . And he is always ready to help you when you 7 him, "she said. The little boy thought 8 a minute and went to the back door. 9 out into the darkness, he called," Jesus? 10 you're out there, would you please hand me the broom?" | |||
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