六级练习2013.07.17
[audio]http://sound.yywz123.com/tingbbs/cet6/cet620130717.mp3[/audio]Getting a flu shot can help prevent influenza. But now, a large study in Britain indicates that older adults who get an annual flu vaccination are less likely to suffer a heart attack. _________________________________, age 40 and older. Researcher Niroshan Siriwardena of Britain's University of Lincoln led the study.
"Our research suggests that flu shots are associated with a reduction in relative risk of heart attack in adults by about 19%." _________________________________. The results were mathematically adjusted to reflect the fact that _________________________________ are more likely to get a flu shot.
**** Hidden Message ***** the study involved more than 78000 people
the reduction was even a higher 21% for people who got the vaccination early in the flu season.
people who are higher risk for heart attack the first place. the study involved more than 78000 people the student involved more than 78,000 people
the reduction is even higher 21% for people who got their vestination early in the flu season
the people who has 1.the study involved more than 78000 people;
2.the reduction was even higher 21% for people who got the vaccination early in the flussion season;
3.people who are higher risk for heart attack than first place the study involved more than 78 thousand people
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