我还是不懂, 我哭!
D中用prevent, 我觉着应是reduce得flu的可能性, 最终还有9%的人得flu了呀, 怎么能说prevent了呢? C应该更精确些, 为什么错呢, 请指教!!!!!!!!!!!!!!!!!!!
我顶!我也觉得C好些,不会就因为C没指出for a year 就错了吧?
I chose (A) The effectiveness of vitamin C in preventing serious cases of flu increases in direct proportion to the amount of vitamin C taken.
Could anybody tell me why (A) is incorrect?
wow, 这D也太不严谨了。Massive是个形容词,怎么能因为前面说了 nutritionist studying the effects of massive doses of vitamin C,就判定massive说的是 试验组1(1500mg)呢。也许1000mg也是massive,而且1000mg不能prevent呀。甚至我都能理解251mg就是massive呢。这种主观的词怎么能出现。
突然想请教一下,大全ABCD是不是ETS的题目呀,会不会是Kaplan呀什么agency的?里面很多东西都太不严谨了。虽说我可能是钻牛角尖,但是确实在别的ETS的题目里面没有这样的情况呀。
顺便说下A:错在direct proportion。
不知道C错在哪?
多谢!
就是regularly.. for a year?明白了。唉,真是。
就单吃一次VC超量是没有的
必须定时吃,吃一年才有效果
所以C的结论不完全
剛剛想了一下,我覺得如果答案是c的話,題目並不需要提到什麼都不吃的這組,只要比較建議用量跟1500mg這兩組就可以了,但d說
不吃和只吃250mg效果都不好,只有1500mg效果比較好,所以可以推論必須大量的吃才有效果
我想C应该是错在后部分,不该是by 25%,而是to 25%这样子
不好意思翻了这么旧的贴子出来,正在一道道题研究,看这个没讨论出结果来就插一小嘴啦:)
我觉得C也蛮有道理吧。。
要说服自己只能认为说C不对在25%这个数字上吧。
文中提到fewer than 9%和34%两个比率,可能应该结论为>=25%吧,呵呵。。。
关于C
250*5<1500
……
这道题的massive我还是觉得有问题,文章只说了2500mg用一年有好处,但是同样是Massive dose,5000mg说不定就要人命了。我觉得选项C太绝对了!
除非他有一个hiden premise,massive dose就是2500mg,但是,这个好牵强啊。如果这样无赖的话,很多逻辑题的weaken就不要做了,你一weaken,他就说这是hiden premise
请指教,谢谢拉
支持18楼,c太绝对了。而题目里只不过是根据sample而做的一个试验,并不能得出那么精确的数字。
C的是有可能的结果,可并不能保证。
大全-D-14. A nutritionist studying the effects of massive doses of vitamin C found that of a group of 600 people who regularly took 1,500 mg of vitamin C daily for a year, fewer than 9 percent suffered serious cases of flu; of a group of 600 people who took 250 mg of vitamin C (the standard recommended daily allowance) daily for a year, 34 percent suffered at least one serious case of flu; and of a group of 600 people who took no vitamin C for a year (other than that found in the foods in a balanced diet), 32 percent suffered at least one serious case of flu.
Which of the following hypotheses is best supported by the evidence above?
(A) The effectiveness of vitamin C in preventing serious cases of flu increases in direct proportion to the amount of vitamin C taken. 错误,因为group three的数据反应就已经不是成正比例了
(B) Vitamin C is helpful in preventing disease. 没有说明分量的多少
(C) Doses of vitamin C that exceed the standard recommended daily allowance by 500 percent will reduce the incidence of serious cases of flu by 25 percent. 太绝对了
(D) Massive doses of vitamin C can help to prevent serious case of flu.
(E) A balanced diet contains less than 250 mg of vitamin C. 错误
Reasoning: there is a study concerning the effects of massive doses of vitamin C.
Group one took 1500 mg of Vitamin C daily a year, and few than 9% suffered serious cases of flu.
Group two took 250 mg of vitamin C daily a year, and 34% suffered at lest one serious case of flu.
Group three took no vitamin C daily a year, 32% suffered at least one serious case of flu.
And it is concluded that massive doses of vitamin C can help to prevent serious case of flu to some extant.
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