断续反复周期工作电器设备中电焊机的设备容量是将额定功率换算到负荷持续率为（）时的有功 发布时间：2017-06-16 23:48 │ 来源：www.tikuol.com 题型：单项选择题 问题： 断续反复周期工作电器设备中电焊机的设备容量是将额定功率换算到负荷持续率为（）时的有功功率。A.25％B.50％C.40％D.100％
题型：单项选择题 选择与下列单词、词组意思相近的一项。( ) 1. It's time for school. ( ) 2. Is your father in? ( ) 3. How are you? I'm OK. ( ) 4. I'm having a sandwich for lunch. ( ) 5. He is Jack. A. go to school A. at school A. nice A. eating A. My name is B. to go to school B. at work B. very well B. buying B. Her name is C. to the school C. at home C. good C. drawing C. His name is 查看答案