在一项队列研究中,非暴露组150名中15人患高血压,暴露组200人中30人患高血压,归因危险度为
A.0.15
B.0.1
C.1.5
D.0.05
E.0.25
参考答案:D
—Henry doesn’t seem to be what he was.
—No. so many terrible things in the war has made him more thoughtful.
A.Seen
B.His having seen
C.Having seen
D.To have seen
通用商品条码EAN-13代码由13位数字组成,这些数字分别代表前缀码、厂商识别代码、商品项目代码和校验码。校验码是用来表示各编码组织所在国家地区的代码。