Jim Green has () many interesting places i 发布时间:2017-04-24 23:47 │ 来源:www.tikuol.com 题型:单项选择题 问题: Jim Green has () many interesting places in China.A.been toB.been inC.gone toD.gone in
题型:单项选择题 一台电动机正常工作时的电压为380V,电流为10A,电动机线圈电阻为2Ω,则它的额定功率为______W,机械功率为_______W,正常工作1min产生的热量为________J. 查看答案