问题
名词解释
离散系数
答案
参考答案：
离散趋势绝对数（平均数）与算数平均数的比值，这是一个无名数，可以用于比较不同数列的变异程度
搜题请搜索小程序“爱下问搜题”
离散系数
参考答案：
离散趋势绝对数（平均数）与算数平均数的比值，这是一个无名数，可以用于比较不同数列的变异程度
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| Learning a new language isn't easy. For many of us, speaking it is the hardest part! Here are some tips (advice)to help you become more comfortable speaking English. Tip 1 When you study, make your mouth do what your mind is learning. If you read aloud, you make your mouth and your mind work. This will help you with both speech and pronunciation(发音) Tip 2 Talk to yourself as much as possible. You need to be comfortable making sounds in English. All over the day, talk to yourself in English! This will help you feel comfortable thinking in English. Then write down what you are saying and read it aloud again. Tip 3 Have a "study buddy(partner)". Get together with him or her at least once a week and study together. Speak as much English as you can whenever you meet. Then you can help each other. Helping yourself talk in English
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