某恙虫病患者,在长期药物治疗后,出现了白色念珠菌感染致鹅口疮,可能是何种药物产生的不良反应()
A.四环素
B.红霉素
C.氨苄西林
D.卡那霉素
E.庆大霉素
参考答案:A
— Excuse me, but may I speak to Mr. Wilson?
— You _____ the wrong number.There is _____ is called Mr. Wilson in our office. [ ]
A. dialed; no such man as
B. are dialing, no such a man as
C. dialed; no such a man as
D. are dialing, no such man as
两样本均数比较的t检验,t<t0.05,ν,则正确结论是
A.μ1=μ2
B.μ1≠μ2
C.两样本均数相同
D.样本均数间的差异有显著意义
E.现有的样本均数差异是由于抽样原因引起的可能性很小