单词拼写

小题1:They saw a penniless young man         （徘徊）on the pavement outside their house.

小题2:I’d just about given myself up when I was       (发现)by a ship.

小题3:The earth became so_____ (激烈动荡)that it was not clear whether the shape would last or not.

小题4:Why they suddenly appeared still remains a ______(谜).

小题5:They are putting too much carbon dioxide into the _____(大气层).

小题6:What ____(使迷惑) me is why he looks so old.

小题7:We should try our best to apply ____(理论) to practice.

小题8:The rise of the sea water is due to the ____(全球) warming.

小题9:The birds were flying in all______(方向) at the gun.

小题10:He ____(测量)the length of the room and went out.

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‰

上述研究的相对危险度为

A．92.7%
B．0.07
C．13.71
D．0.71
E．8.00