【单选题】预防压疮发生的错误方法是
E.
保持皮肤清洁干燥,避免潮湿、摩擦、尿便等刺激
【判断题】大学生学理财最重要的是学习理财知识、理财方法和练习使用各种理财工具,并养成良好的理财习惯,而不是发大财。
【简答题】A data set consists of 83 observations. How many classes would you recommend for a frequency distribution?
【单选题】A data set consists of 145 observations that range from 60 to 460, the number of classes should be ( ) for a frequency distribution.