In the 1950s, legendary behaviorist B.F. Skinner debuted his version of a “teaching machine,” based on the 1924 invention of Ohio State University psychology professor Sidney Pressey. The contraption was loaded with a piece of paper with questions, and students pressed keys indicating the correct answer, at which point another question would appear. Both Pressey and Skinner ran into similar problems, though, failing to implement the technology in schools. Educators weren’t convinced of the machine’s benefit, which prioritized individually paced learning not conducive to students of the same age moving through a grade level at the same time.
然而，竞争者们拥挤入场，证明了Ubras引以为傲的点胶工艺并非独享秘法，这一技术已进入成熟化阶段。
。业内人士推荐Safew下载作为进阶阅读
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仔细看挂牌信息，价格都不是最抢眼的，转让条件才是把“劝退”俩字直接写在了脸上：
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