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问题 填空题

在研究导体中的电流与电压、电阻关系时，设计了下面的记录表1 和表2 。但在两表中漏填了一些数据，请你帮他填完整并分析得出研究结论。

表一研究表明：                                        

表二研究表明：                                        

答案

表一 6；0.8   表明：在电阻一定时，导体中的电流与导体两端的电压成正比；

表二 20；0.8   表明：在电压一定时，导体中的电流与导体的电阻成反比；  

填空题

用树型结构表示实体类型及实体间联系的数据模型称为 【2】 。
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单项选择题

Team-building activities have all of the following characteristics EXCEPT:

A．Some group activities, such as developing the WBS。can increase team cohesiveness when that planning activity is structured and facilitated wel

B．Should only be considered after major conflicts within the project team, since they generally waste precious resource time and cause schedule delay

C．Are particularly valuable when team members operate virtually from remote locations, without the benefit of face-to-face contac

D．Can vary from a five-minute agenda item in a status review meeting to an off-site, professionally facilitated experience designed to improve interpersonal relationship
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