In the country of Veltria, the past two years' broad economic recession has included a business downturn in the clothing trade, where sales are down by about 7 percent as compared to two years ago. Clothing wholesalers have found, however, that the proportion of credit extended to retailers that was paid off on time fell sharply in the first year of the recession but returned to its prerecession level in the second year. Which of the following, if true, most helps to explain the change between the first and the second year of the recession in the proportion of credit not paid off on time? (A) The total amount of credit extended to retailers by clothing wholesalers increased between the first year of the recession and the second year. (B) Between the first and second years of the recession, clothing retailers in Veltria saw many of their costs, rent and utilities in particular, increase. (C) Of the considerable number of clothing retailers in Veltria who were having financial difficulties before the start of the recession, virtually all were forced to go out of business during its first year. (D) Clothing retailers in Veltria attempted to stimulate sales in the second year of the recession by discounting merchandise. (E) Relatively recession-proof segments of the clothing trade, such as work clothes, did not suffer any decrease in sales during the first year of the recession. 这道题错选了A。 思路如下： 题目问的是为什么在经济不好，衣服卖不动的情况下，第一年零售商还不上钱第二年就能还上了。讲的是零售商还钱的问题。 当时留下的是A,C,D 排除D是因为觉得，即使刺激销售量衣服打折也不能说明能还上钱。可能打折卖1块，纵使家当全卖了也不够。 排除C是因为觉得， 那些本身经济状况就很差的在第一年被淘汰掉以后，剩下的那些没说经济状况如何啊，如果也不咋地，第二年还是得淘汰啊。 A选项当时觉得，即使credit extended，对pay off on time也无太大用处，但最起码跟原文意思接近。所以选了A。

想问一下老师这题的定位思路是如何的，大后天就考了。答案是C，还想听一下D的话为什么不能选

想问下老师这题的思路。为什么B选项不对，对于比例是没办法说明坏的多还是少，需要一个说人数一样多来补充证明说motorized确实比non m多。为什么要D

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想问下老师这题的思路是怎么样的，快考试了有点急

想让老师理一下这篇阅读的文章结构还有解决下第4题

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想问下唐塘老师，这题我没看懂题目的意思，查了意思后说是调和xxxx，也不是很明白，然后我看说c讲了两个不同状态的婴儿，对于牛奶的吸收的不同，跟原文里呈现了两种婴儿的比较比较一样，就选了，这思路对么？答案是c

想请问下唐塘老师这题的思路是什么，感觉一点思路都没有

请王文静老师答疑

想问一下may老师，如果这一题把题干改成 a sequence of 6n conseuctive integers, 那是像这样分析吗。