题目内容
(请给出正确答案)
[主观题]
It was in Beihai Park ______ they made a date for the first time ______ the old couple told us their
love story.
A) where; that B) that; that
C) where; when D) that; when
答案
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A) where; that B) that; that
C) where; when D) that; when
第1题
A.has been to
B.has gone to
C.went to
D.will go to
第2题
说明暴露与结局关联强度的指标是
A.RR和AR
B.RR和PAR
C.RR和PAR%
D.PAR和PAR%
E.AR和PAR
第4题
人群特异危险度百分比(population attributable riskpercent,PAR%)