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【单选题】
This week marks the 10th anniversary of the Alar apple scare, in which many American consumers were driven into a panic following the release of a report by an environmental organization claiming that apples containing the chemical Alar posed a serious health threat to preschoolers. The report was disseminated through a PR (Problem Report) campaign and bypassed any legitimate form. of scientific peer review. Introduced to the American public by CBS' '60 Minutes,' the unsubstantiated claims in the report led some school districts to remove apples from their school lunch programs and unduly frightened conscientious parents trying to develop good eating habits for their children. Last month, Consumers Union released a report warning consumers of the perils of consuming many fruits and vegetables that frequently contained 'unsafe' levels of pesticide residues. This was especially true for children, they claimed. Like its predecessor 10 years earlier, the Consumers Union report received no legitimate scientific peer review and the public's first exposure to it was through news coverage. Not only does such reporting potentially drive children from consuming healthful fruits and vegetables, the conclusions were based on a misleading interpretation of what constitutes a 'safe' level of exposure. Briefly, the authors used values known as the 'chronic reference doses,' set by the U. S. Environmental Protection Agency, as their barometers of safety. Used appropriately, these levels represent the maximum amount of pesticide that could be consumed daily for life without concern. For a 70-year lifetime, for example, consumers would have to ingest this average amount of pesticide every day for more than 25, 000 days. It is clear, as the report points out, that there are days on which kids may be exposed to more it is also clear that there are many more days when exposure is zero. Had the authors more appropriately calculated the cumulative exposures for which the safety standards are meant to apply, there would have been no risks and no warnings. Parents should feel proud, rather than guilty, of providing fruits and vegetables for their children. It is well established that a diet rich in such foods decreases the risk of heart disease and cancer. Such benefits dramatically overwhelm the theoretical risks of tiny amounts of pesticides in food. So keep serving up the peaches, apples, spinach, squashes, grapes and pears. In the Alar apple scare, many Americans were frightened because ______.
A.
scientists warned that apples were dangerous
B.
many school children became ill after eating apples
C.
it was reported that apples were harmful to health
D.
apples were discovered to have too much pesticide
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【单选题】高血压患者长期训练后可以降低血压,关于其机制说法错误的是
A.
调整自主神经功能
B.
降低外周阻力
C.
增加血容量
D.
血管运动中枢适应性改变
E.
纠正高血压危险因素
【简答题】全年一次性奖金计算公式为:应纳税额=( )×适用税率-速算扣除数。
【简答题】计算: (1)(-3)×(-9)+8×(-5); (2)-2 2 +(-2) 3 ×5-(-8)÷(-2) 2 .
【简答题】【不定项选择题】 中国公民李某为境内甲公司设计部经理, 2016 年 11 月有关收支情况如下: (1) 基本工资 8000 元,全年一次性奖金 30000 元 ; (2) 为其他单位提供一项设计服务,分两次取得全部劳务报酬,每次 1500 元 ; (3) 在某杂志发表专业文章一篇,取得稿酬 4000 元 ; (4) 房屋租金收入 6000 元 ( 不含增值税 ) ,房屋租赁过程中缴纳的可以税前扣...
【单选题】设集合 M={2,5,8},N={5,6,8},则M ∩ N= 1 {5,8} 2 {6} 3 {2,5,6,8} 4 {2,5,6}
A.
① {5,8}
B.
② {6}
C.
③ {2,5,6,8}
D.
④ {2,5,6}
【单选题】2 设集合M={2,5,8},N={5,6,8},则M ∪ N= 1 {8} 2 {6} 3 {2,5,6,8} 4 {2,5,6}
A.
① {8}
B.
② {6}
C.
③ {2,5,6,8}
D.
④ {2,5,6}
【单选题】作家吴某任职于国内某公司,2018年12月有关收入情况如下:基本工资7500元,全年一次性奖金24000元;小说再版稿酬30000元(该小说于当年2月首次出版,已获稿酬60000元);国内公开拍卖自己的小说手稿所得150000元:一次性讲学收入8500元符合国家规定标准的城镇房屋拆迁补偿款500000元;境内A上市公司非限售股股票转让所得18000元;体育彩票一次中奖收入5000元。已知:工资、薪...
A.
(7500-5000)×10%-105+24000×10%-105=2410(元)
B.
(7500-5000)×10%-105+(24000-5000)×10%-105=1940(元)
C.
(7500+24000-5000)×25%-1005=5620(元)
D.
(7500-5000)×10%-105+(24000÷12×10%-105)×12=1285(元)
【简答题】Yet many scientists are clearly unwilling to acknowledge that the interests of humanity are authentically served only when scientific knowledge is joined to a truthful conscience, and the pursu...
【单选题】Yet many scientists are clearly unwilling to acknowledge that the interests of humanity are authentically served only when scientific knowledge is joined to a truthful conscience , and the pursuit of ...
A.
认知
B.
良心
C.
负疚感
【单选题】Yet many scientists are clearly unwilling to acknowledge that the interests of humanity are authentically served only when scientific knowledge is joined to a truthful conscience, and the pursuit of s...
A.
originally
B.
indeed
C.
basically
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