线性电路的齐次性是指当激励信号(某独立源的值)增加或减小K 倍时,电路的响应(即在电路中各电阻元件上所建立的电流和电压值)也将增加或减小K倍。
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基尔霍夫电压定律指出:集中参数电路中,对任何一个闭合回路而言,应有ΣU=0。
A. 对
B. 错
基尔霍夫电流定律指出:集中参数电路中,对电路中的任一个结点而言,应有ΣI=0;
A. 对
B. 错
Listen to five salespeople and their customers. In each case the salesperson is either following a step from the article on ‘How to sell…’ or failing to follow it. Write the number of the step (写出数字号即可)next to the salesperson and write what you think they are selling.(产品名称)Step 1 Build trustStep 2 Don’t misunderstand the customerStep 3 Ask clever questionsStep 4 Know your stuffStep 5 Don’t overload people with detailsStep 6 Salespeople are not necessarily bornStep 7 Be prepared to failStep Product or service?Salesperson 1 ________ _________________________Salesperson 2 ________ _________________________Salesperson 3 ________ _________________________Salesperson 4 ________ _________________________Salesperson 5 ________ _________________________[音频]
超高温杀菌设备所用的管式换热器有换热器和 换热器两种类型。