题型:选择题 —I regretted what I have done.—_______ gone is gone. ______ no use regretting it any more.[ ]A. What's; That's B. It's; That's C. What's; It's D. That's It's 查看答案
题型:多项选择题 根据《施工现场临时用电安全技术规范》(JGJ46-2005)第7.1.13规定,架空线路绝缘子应按下列哪些原则选择()A.直线杆采用蝶式绝缘子B.直线杆采用针式绝缘子C.耐张杆采用针式绝缘子D.耐张杆采用蝶式绝缘子 查看答案