did not！！！

注意这里不能认为去修饰birds，原因是：ovenbird family只是新世界热带鸟（New World tropical birds）的一个种群，并不代表所有热带鸟一共只有230个种群，只能说热带鸟的一个group有230个种群。

行吧，这么坑的么

果因推理；
（果）前提：田鼠在晚秋到冬季一般生活在大家庭；春到早秋，大部分生活在更小的家庭。
（因）结论：家族大小随季节变化可能被幼年田鼠的死亡率随季节变化来解释
E: 春夏季小群生活，年轻V死得多，所以才成了小群

2^(3)*C(5,3)=80

有趣的鸡阿姨题？

错选D。需要搞清楚倒装结构中的主语到底是谁。

1、比较对象对等：rate只能是high/low；grow才能是fast/slow。
2、growing的逻辑主语是suppliers，暗示有别的人在grow fish，不合适。
3、cutting XXX and raising平行

题目也太拗口了吧

C的主要问题还是在主观上，主观不会改变现实。分清楚“短缺”到底是不是现实啊啊啊啊啊

开头第一句话是问题，
而第一处黑脸（第二句话）应该是问题的development，
第三句话是对问题的回复，
第四句话是对回复的评估的结果提供证据，
第五句话（第二处黑脸）是评估的结果。

选B：第一处黑脸呈现了 对一个问题的一个（论据评估的）回复。【present A to B = present B A】
那划线部分应该指向第三句才对。这道题划线部分应该是有问题的。

The question remained: how can such quakes occur,

how can such quakes occur, given that mantle rock at a depth of more than 50 kilometers is too ductile to store enough stress to fracture? Wadati's work suggested that deep events occur in areas (now called Wadati-Benioff zones) where one crustal plate is forced under another and descends into the mantle. The descending rock is substantially cooler than the surrounding mantle and hence is less ductile and much more liable to fracture.

the more common shallow events, in which the focus lay just under the epicenter, and deep events, with a focus several hundred kilometers down.

Most earthquakes had a small area of intense shaking, which weakened rapidly with increasing distance from the epicenter. but others were characterized by a lower peak intensity,

For most earthquakes, wadati discovered, the interval was quite short near the epicenter

a frozen structure of relative prices imposes distortions that do damage to the economy's prospects for long-term growth.

Intended作为过去分词修饰fund, rule plan 等物都应该是被intended

假设题：当成削弱题来做然后取非：如果P和C之间没有明显的gap，那么转换思维，把假设题当作削弱来做，先找削弱方向，对削弱方向取非即为假设方向。

B选项是否和原文矛盾？如果X和Y面积相等，X的人口密度大，那么Y的人口不可能比X多吧？