由于作直方图过程中分组过多、或测量时读数有误、或测量仪器精度不够等原因易造成()的非正常型直方图。
A.双峰型
B.孤岛型
C.锯齿型
D.陡壁型
参考答案:C
When he was there, he _________ go to the coffee shop after work every day.
A.was used to
B.should
C.would
D.had better
发病5~8个月为多,中等量蛋花汤样稀便,伴较多黏液有霉臭味,镜检少量白细胞()
A.生理性腹泻
B.病毒性肠炎
C.细菌性痢疾
D.坏死性肠炎
E.大肠杆菌性肠炎