| 如图所示，处在磁感应强度为B的匀强磁场中的单匝矩线圈abcd，以恒定的角速度ω绕ab边转动，磁场方向垂直于纸面向里，线圈所围面积为S，线圈导线的总电阻为R．t=0时刻线圈平面与纸面重合，且cd边正在离开纸面向外运动．则正确的是（ ） A．时刻t线圈中电流的瞬时值i B．线圈中电流的有效值I C．线圈中电流的有效值I= D．线圈消耗的电功率P  |
答案：C
| 认真阅读下列短文,根据所读内容在文章后表格中填入恰当的单词.注意:表格中的每个空格只填1个词. | ||||||||
| Traditionally,customers may consider more about what they buy the product for.However,the image of product and the consuming circumstance have become the key points to attract customer awareness and stimulate their buying needs. Frequently,customers buy goods just because they are cute,lovely and unique.With a less emphasis on functional utilities, the experience and imaginative space are placed into an increasingly important role.The image of product is emphasized, as well as the communication between products and consumers."Customer behavior,which appears to be focused and directed at the object and at pleasure,in fact responds to quite different objectives:displaced expression of desire,and the production of a code of social values through the use of differential signs" (Baudrillard).The reason for image-oriented customer behavior is probably that customers' lifestyle has been continuously virtualized by paying much attention to "Virtual Reality".The evidences can be traced from computer games and Hollywood movies,in which customers' preference for fleeing reality is perfectly matched. This change requires us to take efforts to enhance product image by integrating style,color,taste,shape and material, and communicate with customers creatively,imaginatively and innovatively,and enable them to enjoy the distictive experience image brings." "〔A〕need is not a need for a particular object as much as it is a 'need' for difference" (Baudrillard).The typical example is Apple Computers IMAC,which has strong visual impact and outstanding dynamics. By this way,customer relationship can be set up through image,and brand can be treated as living that can transform people.Other examples commonly used are Disney Fairyland and Las Vegas,where new experience and imagination are fully demonstrated.In sum, consumption is negotiation,a never-ending conversation held in the languages of advertising, packaging,branding,fashion,and entertainment. More Attention to the Image of Product
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cosωt
