搜题
王老师:19139051760(拨打)
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第1题

11．典型一阶惯性环节的时间常数可在单位阶跃输入的响应曲线上求得， 时间常数是 A 响应曲线上升到稳态值的95%所对应的时间 B 响应曲线上升到稳态值所用的时间 C 响应曲线在坐标原点的切线斜率 D 响应曲线在坐标原点的切
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第2题

An example of soft sell is to distribute free samples ______ customers often respond favorably. 选择一项： A. to which
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第3题

( )3.What does the phrase “to take on” in the sentence “The company takes on only fifteen to twenty graduates each year
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第4题

______ your price be competitive and date of shipment acceptable, we intend to place a large order with you. 选择一项：
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