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【多选题】
变压器漏感对整流电路的影响包括（）。A.
存在一定的换相时间
B.
参与换相的两条支路同时导通
C.
输出电压平均值降低
D.
参与换相的两支路电流不能突变
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举一反三
【多选题】Among the most important inorganic ions for cells are _________________________. The movement of these ions across cell membranes plays an essential part in many biological processes, but is perhaps m...
A.
Na + and K +
B.
Ca 2+
C.
Clˉ and H +
D.
Mg 2+
【简答题】enormous erode horror reaction startle striking via 1. A member of the crew was __________ to see a mouse under a seat. 2. ___________ is what most people feel when they see someone...
【简答题】Complete the following sentences with the following words and phrases. permeate / wrestle /push the envelope / run the gamut / when it comes to 1. It is perhaps the most striking evidence of the exten...
【简答题】remarkable , outstanding, striking (Directions:) Fill in the blanks with the words above. C hange the form where necessary. 1. From the outside, the most _____ aspect of the building is its tall, slen...
【简答题】解下列: 1.7-2x=3-4x; 2.1.8t=30+0.8t
【简答题】变压器运行时基本铜耗可视为 ,基本铁耗可视为 。
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