首先搞懂题目问题，剩余要有多少比例投反对票才能使得总票数有2/3的反对票
2/9 * 1/4 +7/9 * X = 2/3

In addition to不是平行marker

（2）算半天算不出来，浪费时间

要找的削弱是 针对通过过桥费finance improvement这个计划的effectiveness

the rate of fatty foods 的核心词语是 fatty food meaning有误

文章没说theory 就不要选theory

还是因为文章绕过来绕过去 没读懂意思的原因！文章说的是 早期因为有弹性 leaving no low gravity anomaly in the resulting basin.

想象将两个正方形平面展开

c

508

491

you might want to re-read the stmt-2. 3/2 more cups is different from 3/2 times more cups. when it says times, you can take s + s(3/2) but it's just a cup and half over s so s + 3/2.

E 黑熊的栖息地地形比懒熊的更加复杂。然后原文说，"... if black bear cubs are able to keep up with their mother, so too should sloth bear cubs."。这其实是【加强】原文，黑熊在复杂的地形都可以跟上，懒熊在没那么复杂的地形更（也）可以跟上。

especially when focused on technology，其在语法上只能作伴随状语（普通连词加分词短语肯定是伴随状语），伴随状语中分词短语的【逻辑主语必须同其所修饰的主句的主语相同】，本题中即downturn。

【To attract these consumers back,】 several manufacturers of name-brand cereals [plan to narrow the price gap 条件 ] between their cereals and store brands to less than what it was five years ago.
Which of the following, if true, most seriously calls into question the likelihood that the manufacturers' plan will 【succeed in attracting back】...

同位语与独立主格最主要的区别在于：同位语描述的是事物的具体内容、特征，是一种解释；
独立主格则是表示一种伴随状态，描述与所描述分句同步发生的事情。

charges a fixed processing fee

由1，k=36，27，38，39，或者40，41，42， 43 44 所以k的十位不确定。
由2，k的个位数>5,则k+5的个位数要进一位，得到4，故k的十位是3.所以2充分。1不充分。

it & so 区别:
---by ruqi
choice a, 代词it能够指代的对象只有单数名词colony, 语意不正确
choice b, did so指代了establish a permanent colony。 correct