问题
单项选择题
事高致病病原微生物相关实验活动的实验档案保存期，不得少于（）年。
A.5
B.10
C.15
D.20
答案
参考答案：D
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事高致病病原微生物相关实验活动的实验档案保存期，不得少于（）年。
A.5
B.10
C.15
D.20
参考答案：D
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