FRA540变频器的输出频率的范围是:()。A.0~50Hz B.0~60Hz C. 发布时间:2017-10-10 23:28 │ 来源:www.tikuol.com 题型:单项选择题 问题: FRA540变频器的输出频率的范围是:()。A.0~50HzB.0~60HzC.0~400HzD.0~500Hz
题型:单项选择题 Cathy went to the hospital alone. If she had told me about it, I ____ with her. [ ]A. had goneB. would have goneC. would goD. went 查看答案
题型:单项选择题 患者,男性,59岁。约有10年高血压病史,经强心、利尿治疗好转,但近日病情加重,出现心悸,气短,下肢水肿加重。诊断为原发性高血压,慢性心功不全,心肌肥大,最好加用哪种药物继续治疗()A.卡托普利B.硝苯地平C.肼屈嗪D.哌唑嗪E.氨茶碱 查看答案