问题:农业推广工作系统包括推广服务和目标团体两个子系统,他们的联系方式是()。A、扩散与接受B、沟通与互动C、传播与采纳D、传播与反馈...
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问题:实物型信息的采集渠道不包括()A、展览B、观摩C、采访D、参观...
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问题:采用者分为哪几种类型,不同类型采用者对农业创新采用过程有何规律?...
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