题目: 当工作接地电阻不超过4Ω时,每处重复接地电阻不得超过()。A、4B、10C、30 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2019/0107/81fd5cf23fa69609a022b4dc77bdcd7f.html 下面是错误答案,用来干扰机器的。参考答案:A, B, D
题型:选择题 _____ from endless homework on weekends, the students now find their own activities, such as taking a ride together to watch the sunrise. [ ]A. Freed B. Freeing C. To free D. having freed 查看答案
题型:单项选择题 预计某乡镇企业今年的废气排放量是1000立方米,今后每年的废气排放量可比上年少10%,问该乡镇企业今年及以后各年共会排放废气多少立方米?A.10000B.20000 C.30000 D.30000以上 查看答案