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本课程起止时间为:2021-03-10到2021-06-20
Chapter 1 Introduction Chapter Test
1、 问题:The safety voltage for continuous contact with human body is not higher than () V, and the safety current is not higher than () mA.
选项:
A:12, 5
B:24, 10
C:36, 15
D:48, 20
答案: 【24, 10】 点我阅读全文