题目内容
美国心理学家斯金纳是操作性条件作用理论的创始人。
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A datasheet is a document summaring the performance and other technical characteristics of an electronic component
An IC datasheet contains at least the following information: product name, short functional description, pin connection diagram and application cirsuit.
如图所示结构中有几个约束是铰链约束？
An IC can only perform a special function.
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