噬菌体侵染细菌的实验证明了噬菌体的遗传物质是() A.DNA B.蛋白质 C.多糖 发布时间:2019-03-11 00:05 │ 来源:www.tikuol.com 题型:单项选择题 问题: 噬菌体侵染细菌的实验证明了噬菌体的遗传物质是()A.DNAB.蛋白质C.多糖D.RNA
题型:单项选择题 ---Sorry, I made a mistake again. ---_____. Practice more and you’ll succeed.A.Never mindB.Certainly notC.Not at allD.Don’t mention it 查看答案
题型:单项选择题 患者,男性,60岁。7年心肌梗死病史,近几年常感乏力,气促,此次因症状加重入院,同时伴有下肢水肿。双肺满布湿啰音,心率70次/分,BP100/70mmHg,已经使用ACEI药物。持续血钾在2.7mmol/L,以下治疗正确的是()。A.加用螺内酯12.5~50mgB.加用螺内酯50~100mgC.口服补钾D.继续观察E.以上均不对 查看答案
题型:单项选择题 —_____ you ever _____ to my hometown? —Yes, I went there last year. [ ]A. Have, been B. Have, gone C. Did, go D. Are, going 查看答案