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判断题
In the whale, Marlin's half-full mind shows us that he concerns and feels thankful for what is owned with optimism, living at present with endless life passion.
答案:
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《1932年华沙牛津规则》是国际法制会为解释()术语制定的
答案:
正确答案:CIF
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A 50 kV·A single-phase transformer which rated voltage is 6600 / 230 V.cosφ2=0.8. Given that the core loss is 600W, the copper loss is 1500W. U2=220 V(full-loading).
Find the efficiency of the transformer (full-loading). %
答案:
(94,95)
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