1. The second thing I’d say relates to the airline that you choose or the cost of flights, and I think it’s important to ________ cost, concerns ________ the need for comfort for the business traveler.
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参考答案:
举一反三
【单选题】已知三相电源线电压U L =380V,三角形联接对称负载Z=(6+j8)Ω。则相电流I L =( )A。