条件2可以算出值，但是无法判断(x - 1)(y - 1) = 1 ，这个等式不是前提条件

条件2无法限制答案，而就算没有条件2也可以直接从条件1推出x是50

带入数字说明条件1&2无法保证n>1

条件2中y可以是2或-2，无法确定值

Mark, The range of the n integers is 14 指的是n个数之间的相差范围是14,7个间隔，8个连续的奇数

The large volume of transactions associated with these activities seems to have necessitated hierarchical management structures well before the advent of modern communications and transportation.

real标错了，最后一句话的real

把条件都列好之后用代入法

Clearly price promotions are generally run at a loss, otherwise there would be more of them.

前一个题不是刚说each of which 不对吗，这道题为什么又对了

怎么模考不了awa和ir啊

看仔细来还有个fishing industry

我错选了A，因为感觉这个答案说得也很合情理，即作者不应该把制造部作为集团的典型代表。但其实细细看原文，在premise里作者就是把制造部作为整个集团的代表的，即A选项攻击了premise而非结论。D选项是直接攻击结论的

C：as a result不是连词。they是一个复数代词，而需要被指代的对象是单数名词the country。// raising fears that other countries是伴随状语，逻辑主语是是其修饰的句子的主语the country

argument=The common view is that the Highland's deforestation was caused by human activity, especially agriculture. 前半句是evidence，排除CDE，后半句为前半句提供更加有力的证据去support ecologist的观点（他们的观点就是反对argument的position，就是那么绕。。）A错在counter the evidence（应当是argument）

看ztj的答案

重点是化简

代数进去就是

(1) When x is divided by 2, the remainder is 1 --> x is an odd number AND "when x is divided by 3, the remainder is 0" --> x is a multiple of 3 --> so, x is an odd multiple of 3: 3, 9, 15, 21, ... --> you can see a definite pattern here that any such number divided by 6 yields remainder of 3. Sufficient.

重点分析Sharon's argument