下列哪种药物产β—内酰胺酶细菌有效() A.青霉素G B.阿莫西林 C.苯唑西林 D 发布时间:2019-02-04 04:40 │ 来源:www.tikuol.com 题型:单项选择题 问题: 下列哪种药物产β—内酰胺酶细菌有效()A.青霉素GB.阿莫西林C.苯唑西林D.氨苄西林
题型:单项选择题 -----Hi, Nancy, I didn’t know you had come back. So have you graduated from college?---- Yes. I _____ French for 5 years in Nanjing.A.have studiedB.studiedC.had studiedD.am studying 查看答案
题型:单项选择题 压水试验时,用安设在进水管上的压力计测压时,试段总压力P的计算公式为()。(式中:P1为压力计指示的压力;P2为压力计中心至压力计算零线的水柱压力;P3为管路压力损失)A.P=P1+P2+P3B.P=P1+P2-P3C.p=P1-P2+P3D.p=P1-P2=P3 查看答案