毛发
发表于 2025-3-21 17:41:26
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Carcinoma
发表于 2025-3-21 23:03:16
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纺织品
发表于 2025-3-22 04:04:22
The Electrical Circuit,t is its . (see section 1.10 for a full discussion). Using resistivity as a means of defining the above categories of material, conductors have a resistivity in the range from zero to 10. ?m, semiconductors have a resistivity in the range 10. to 10. ?m, while the resistivity of insulators is above 10. ?m.
繁重
发表于 2025-3-22 05:44:24
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Hdl348
发表于 2025-3-22 08:52:43
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嘲笑
发表于 2025-3-22 13:41:39
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嘲笑
发表于 2025-3-22 17:14:08
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郊外
发表于 2025-3-22 21:58:50
Grundlagen der soziologischen Theoriesuch as those on an electric current, or on iron filings, or on a permanent magnet. The . in which the magnetic field acts at a particular point is given by the direction in which the force would act on an isolated north-seeking pole (a N-pole) at that point. The theoretical concept of an isolated n
稀释前
发表于 2025-3-23 02:06:19
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拱形面包
发表于 2025-3-23 07:04:41
https://doi.org/10.1007/978-3-662-41210-7 ‘direction’ arrows on circuit diagrams for such quantities as voltage and current. The notation used in a.c. circuits follows the general principles laid down in chapter 1 for d.c. circuits as follows.