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Day 4
1. 咖啡因和失眠
Although it is sometimes claimed that consuming caffeine at high levels does not cause insomnia, statistical evidence shows that it does. Study after study has found that people with high levels of caffeine consumption from beverages such as coffee, tea, and soft drinks are far more likely to suffer from insomnia than people who consume little or no caffeine.
Which of the following is an assumption on which the argument depends?
A. Consumption of caffeine from sources other than coffee, tea, and soft drinks is unlikely to cause insomnia.
B. Caffeine consumption is the only commonly occurring cause of insomnia.
C. People suffering from insomnia do not typically respond to their lack of sleep by consuming much more caffeine than they would if they did not suffer from insomnia.
D. The only evidence available to show whether caffeine causes insomnia is statistical evidence showing correlations between caffeine consumption and insomnia.
E. Anyone who regularly consumes caffeine in more than moderate quantities will suffer from insomnia.
P: People who drink more caffine beverage are far more likely to suffer from insomia than those who don't.
C: High level caffeine causes insomia.
Assumptions: The people did't do other things that will cause insomina.
A Weaken
B Negating B will strengthen
C Negating C: lack of sleep ==> so drink more. If so, the author cannot draw the conclusion.
D Negating D will strengthen
E No tie to conclusion
Answer is C
2. Computer worms
computer worms are mostly malicious. However, one of the widespread computer worms adds security features for infected computers. However, although the creator of this computer worm had good intention, he did more harm than good. explain this discrepancy.
P: His computer worms adds security features for infected computers.
C: The creator did more harm than good.
Reason: His warms causes other seriors problems, e.g.massive data lost.
3. Motorized TM 维修做了一个调查,motorized TM 十年中10%需要维修,non-motorized TM 只有2%需要维修。如果人们想在日常使用中不被disrupt or disrupt更少,就应该用non-motorized。问assumption
选项有
A: 做survey的这些人,买motorized的和买non-motorized的一样多
B: 买motorized TM的人没有比买non-motorized TM的人用的次数更多
P: 10% of M need maintenance in 10y, but only 2% of non-M need.
C: If don't want to be disrupted, then should choose non-M
Assumptions: No other factor will cause disrupt.
A: Irrelevant comparison
B: M use less but need more maintenance. This must be ture, otherwise it means M use more and maintain more, weaken the conclusion.
Answer is B
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