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阅读理解。 Eating too much fatty food, exercising too little and smoking can raise your future risk of heart disease. But there is another factor that can cause your heart problems more immediately: the air you breathe. Previous studies have linked high exposure (暴露)to environmental pollution to an increased risk of heart problem, but two analyses now show that poor air quality can lead to heart attack or stroke (中风)within as little as a few hours after exposure. In one review of the research, scientists found that people exposed to high levels of pollutants (污染物)were up to 5% more likely to suffer a heart attack within days of exposure than those with lower exposure. A separate study of stroke patients showed that even air that the U. S. Environmental Protection Agency (EPA) considers to be of 'moderate' (良好)quality and relatively safe for our health can raise the risk of stroke as much as 34% within 12 to 14 hours of exposure. The authors of both studies stress that these risks are relatively small for healthy people and certainly modest compared with other risk factors such as smoking and high blood pressure. However, it is important to be aware of these dangers because everyone is exposed to air pollution regardless of lifestyle choices. So stricter regulation by the EPA of pollutants may not only improve environmental air quality but could also become necessary to protect public health. 1. The text mainly discusses the relationship between . A. heart problems and air quality B. heart problems and exercising C. heart problems and smoking D. heart problems and fatty food 2. The underlined word 'modest' in Paragraph 3 most probably means . A. relatively high B. extremely low C. relatively low D. extremely high 3. What can we learn from the text? A. Eating fatty food has immediate effects on your heart. B. The EPA conducted many studies on air quality. C. Moderate air quality is more harmful than smoking, D. Stricter regulations on pollutants should be made. 4. The author's purpose of writing the text is most likely to . A. inform B. persuade C. describe D. entertain
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A.
by credit card within seven days.
B.
in weekly instalments.
C.
by cheque or cash within one week.
【多选题】菲德勒将权变理论具体化为:( )
A.
职位权力
B.
任务结构
C.
上下级关系
D.
同级关系
【判断题】离散型变量只适合于单项式分组
A.
正确
B.
错误
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【多选题】存货实物数量的确定方法有
A.
定期盘存制
B.
权责发生制
C.
永续盘存制
D.
收付实现制
【多选题】菲德勒将权变理论具体化为哪几个方面()
A.
组织结构
B.
职位权力
C.
上下级关系
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任务
E.
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【简答题】Student A and B role-play the following dialogue in class. A: Now we have settled the terms of payment. Is it possible to effect shipment during September? B: I don't think we can expect shipment? A: ...
【判断题】离散型变量只适合于进行单项式分组。
A.
正确
B.
错误
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【简答题】第三部分 阅读理解一二篇 36_______ 37_______ 38 _______ 39________ 40________ 41_______ 42_______ 43_______ 44________ 45________
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