标准正态分布曲线的特征是()
A.μ=σ,σ=0
B.μ=0,σ=1
C.μ=0,σ=-1
D.μ=1,σ=0
E.μ=1,σ=1
参考答案:B
---Sorry, sir. I can't answer this question.
---Well, you are supposed ______ this part of history.
A.reading
B.to be reading
C.to read
D.to have read.
以下哪些药物可用于弓形虫感染的治疗
A.乙胺嘧啶
B.磺胺嘧啶
C.乙酰螺旋霉素
D.青霉素
E.克林霉素