已知K2O2与CO2的反应类似Na2O2与CO2的反应。 某潜艇要执行水下任务，
题型：计算题
问题：
已知K2O2与CO2的反应类似Na2O2与CO2的反应。
某潜艇要执行水下任务，共25位船员，大概每人每天需耗氧1.6 kg，如果船载K2O2 2.75 t作为供氧剂，潜艇最多能下潜几天？
题型：计算题
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| Lucy's mother is a pretty woman. She likes new clothes, and she buys many new clothes. They are 1 _ . Every Saturday she goes shopping 2 her friends. Sometimes she buys clothes, and sometimes she helps her friends 3 clothes. She likes 4 very much and she enjoys helping 5 on buying things. She always wears beautiful clothes when she 6 . her friends say she is very rich 7 she has so many beautiful clothes. But that's not 8 . One day she and her husband are at home. She says to her husband, "dear, look at the old clothes I have to wear! 9 ugly they are! If someone comes to visit our family, they may think I must be a cook.." "A cook?" her husband says, "do they think you are a cook? and you always buy so many new clothes! Aren't they nice? I think the visitors must 10 their mind if they are at our home and have dinner  ." | ||||
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