Neither compares tasks in dissimilar jobs (that is, jobs across occupational categories) in an effort to determine whether or not what is necessary to perform these tasks can be quantified in terms of its dollar value to the employer.

Bi, can you stop justifying your ignorance?
According to the context , we can hardly assume the very intention of human being is to encounter more prey, nor should we justify the usage of "HAD done" .
In case of any refutation, here is the origin.
The research, which was published in the Feb. 9 issue of the journal Science, has implications both for the modern-day debate over reintroduction programs and for a historical debate over what happened 10,000 to 50,000 years ago, when one particular predator, humans, expanded its territory and encountered large numbers of native prey. Some experts think that a ''blitzkrieg'' of killing by advancing humans contributed to the extinctions of many large animals in that era.

See, It's an article from NY Times. what I wanna say is stop offering your misguidance and misinterpretation!

Ron:
C:the major problem with (d) is the incorrect construction "of + NOUN + VERBing".
also, it's unidiomatic to say that a RATE is "half" (or "more/less than half"). you could say that a rate is 50%, but not "half".

只看最后一个句子就好了，裂开。。。

A错在哪里啦？

A is employed as B的意思是：A被雇佣为B-积极正面
A is employed to be B的意思是：A被利用为B-消极负面
幸好现在遇到了，要是未来工作中用错了就尴尬了

错选b的我。。。。哎 https://forum.chasedream.com/thread-348240-1-1.html ability to do！ability to do！

A,B，without adequate amounts of sleep 逻辑主语应该是people，如果主句的主语改成people有没有问题？
C, they ... people's skills... 指代不对
E，adequate本来就有amount they need的意思，足够多的

审题！x和y是正整数

rather than by burning calories to generate it
by drawing 与by burning平行

应该只根据前面部分来选

哥，这不是加强，是找assumption! 另外题目翻译也错了！！！是另外一个group, to who was described this scenario.

行文逻辑：结论-条件-确认结论
BF1:碎片本身不含硫，但大气层下的云层含硫
BF2:碎片的大小至少要使它不被烧焦在大气层中

条件一：把w+y看成是一个负数为a, 把x+y看成是另一个负数为b, a-b=w-y，试想一下，两个负数相减，我们不能并不能判断是大于零还是小于零，也就无法得出w和y的大小了。（我觉得这样理解比较清楚）
条件二：就很明显了，直接给出y和w的关系

哎 把B选项分母的t看成了s, 选了这个

看了好久都没想出来选哪个 淦

要把120000*10。。

本质上是推理题而不是阅读题，思路搞错了，答案根本就不在原文

原来主将从现是这么来的，厉害了