政府采购采用邀请招标方式采购的,投标人应当在资格预审公告期结束之日起()个工作日前,按公告要求提交资格证明文件。
A.1
B.3
C.5
D.10
参考答案:B
某学者在某地进行吸烟与肺癌关系的研究,结果显示,该地人群肺癌年死亡率为0.56‰,吸烟与不吸烟者的肺癌年死亡率为0.96‰和0.07‰。
上述研究的特异危险度为()
A.0.40‰
B.0.89‰
C.92.7%
D.87.5%
E.0.49‰
3. ______, I can spare no time for it now. I’ll have to finish my homework first.
A.However exciting the football is
B.No matter exciting the football is
C.However the football is exciting
D.No matter how the football is exciting