非电工和无证者不得从事电气工作,电气作业须()人以上进行。 发布时间:2017-10-14 19:26 │ 来源:www.tikuol.com 题型:填空题 问题: 非电工和无证者不得从事电气工作,电气作业须()人以上进行。
题型:填空题 ()all ships in a large sea area being alerted, an “area call” will normally be transmitted so that only those ships in the vicinity of the distress incident are alerted.A.AvoidingB.To be avoidedC.AvoidedD.To avoid 查看答案