已构成既定事实的数据称为()。
A.定量数据
B.主观数据
C.客观数据
D.定性数据
参考答案:C
某病在某地区显著超过该病历年发病率水平()
A.散发
B.暴发
C.流行
D.大流行
E.大暴发
When ___you _____ your breakfast this morning? At 6.00.
A.have, had
B.did, have
C.are, have
D.has, had