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4.依據CNS線規7/2.0mm之硬抽銅絞線截面積為多少平方公厘?(A)22(B)30(C)38(D) 50
問題詳情
4.依據CNS線規7/2.0mm之硬抽銅絞線截面積為多少平方公厘?
(A)22
(B)30
(C)38
(D) 50
參考答案
答案:A
難度:困難0.382022
統計:A(34),B(14),C(19),D(3),E(0)
用户評論
【用戶】
leila52033
【年級】高二上
【評論內容】這題怎算?謝謝
【用戶】
Eric Shen
【年級】
【評論內容】A=(3.14 * d^2*N)/4d=2N=7代入
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