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采用方便抽样的方法,抽取昆明市主城区9所中等职业技术学校。
Methods 9 vocational schools in Ktmming are selected by using the convenience sampling method.
youdao
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采用方便抽样的方法,抽取昆明市主城区9所中等职业技术学校。
Methods 9 vocational schools in Ktmming are selected by using the convenience sampling method.
youdao