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【多选题】
影响消毒灭菌效果的因素有A.
消毒剂的性质、浓度与作用时间
B.
微生物的种类与数量
C.
温度
D.
酸碱度
E.
有机物
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【单选题】---Do you often get online? ---Yes.I ___ most of my time on it.It's a good way to kill t
A.
cost
B.
spend
C.
pay
D.
take
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