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。

请数学老师解答 谢谢

请数学老师解答，谢谢

请数学老师解答 谢谢

请数学老师解答 谢谢

一家餐厅有A B两个list的side dishes，两个list都不重样，给出一共有18种搭配方式，问B list里有几个菜 条件1：AB一共有11个菜 条件2：A有2个菜 请数学老师解答 谢谢老师

一个圆内接长方形，问长方形周长是多少？ 条件1：圆半径为2； 条件2：长方形的一条边是2 请数学老师讲解，谢谢老师

请问下金老师，先通过主谓一致排除a，通过in doing sth “在哪方面干什么”意思不对排除ce，剩下bd怎么选择呢？感觉时态没法做选择，前面一个用using 一个用by the use of …使用过动词优于名词来最后选择b吗？

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请老师完整解答一下这道题解题思路，我选的A，认为后面是一个介词短语修饰语。

王文静老师你好，就这道题目，我特地查了字典，with可以表示一件事情的factor和这件事情的关系的，换句话说，C选项我读到with，我第一反应就是自动就理解为后面的两个条件（factor）是导致output tripled的原因，所以认为这句话即处理了因果关系也表达了两个factor之前的并列关系。麻烦老师指出我的语法理解问题