题目内容
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。
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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；
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。
中心套管式换热器是将2个或3个不锈钢管以同心的形式套在一起，管壁之间留有一定的空隙，同轴管数量有、。
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