陈向东逻辑第五章42题 求高人指点

clwnhnas

本人新手，做过一遍OG，现在做陈向东逻辑，感觉里面说的取非什么的好复杂，绕的昏了，其实我觉得光看中文大多数题目都能做出来的，问题是英文不好读不懂题，这题我琢磨很久没头绪，大家参谋下吧！

One state adds a 7 percent sales tax to thr price of most products purchased within its jurisdiction.This tax,therefore,if viewed as tax on income,has the reverse effect of the federal income tax:the lower the income,the higher the annual percentage rate at which the income is taxed.
The conclusion above would be properly drawn if which of the following were assumed as a premise?
A.The amount of money citizens spend on products subject to the state tax tends to be equal across income levels.
B.The federal income tax favors citizens with high incomes,whereas the state sales tax favors citizens with low incomes.
C.Citizens with low annual incomes in state sales tax,since their federal income tax is relatively low.
D.The lower a state's' sales tax,the more it will tend to redistribute income from the more affluent citizens to the rest of society.
E.Citizens who fail to earn federally taxable income are also exempt from the state sales tax.

clwnhnas

答案是A,解释是“转化为数学思维课很容易得出A答案，并可对A进行取非验证”

sdcar2010

What the stimulus says is: If A's income is lower than that of B, then A would spend a bigger proportion of his income than B to buy those products subject to tax.

Secondly, the question is a sufficient assumption question, which should NOT rely on negation method to find the correct answer.

If you insert choice A) into the passage, then A and B would spend the same amount of money on those products, then definitely A is taxed higher than B is because A earns less.

sdcar2010

I cannot believe someone would use the negation method to find a sufficient assumption. That's not the right way to tackle such problems!

clwnhnas

原来是这样，谢谢