____of the workers in the factory are from the countryside.
一 Yeah, we_________ their team by 5:4.
一 That‘’s great! Congratulations!
某技术员在分析醋酸溶液中溶质的含量时,测得溶液中氧元素的质量分数为80%,则该醋酸溶液中,醋酸的质量分数为( )