焊机一次侧电源线长度最大不得超过()。 A.5m B.30m C.40m D.50m 发布时间:2017-09-17 05:49 │ 来源:www.tikuol.com 题型:单项选择题 问题: 焊机一次侧电源线长度最大不得超过()。A.5mB.30mC.40mD.50m
题型:单项选择题 — Laura can't come for dinner. She's leaving for Beijing tonight. — _____. I hope I can talk to her soon.[ ]A. What a shame B. Never mind C. Yes, she should D. With pleasure 查看答案