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【单选题】
有一三相对称负载接于线电压UL =380V的三相电源上,其每相的电阻R=16 Ω,感抗XL =12Ω,则负载星形联结时的相电流为()A.
11A
B.
19A
C.
33A
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【简答题】党参的功效为:()、()生津。
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【简答题】党参的功效为 , 。
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