单项选择题

煮沸灭菌法,杀死带芽胞的细菌所需时间为( )

A. 10min

B. 20min

C. 30min

D. 60min

E. 120min

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问答题

Directions: Please write down how you would say the equation below.
15÷5=3

答案: Fifteen divided by five equals three
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