请教：d选项: whereby的解释，whereby不可以等于by which吗？不是因为副词原因吧？

动名词强调事件的过程，纯名词强调事件的结果。Mark~

这个总结很有用，学习啦！

A 鲨鱼吃海豚，没提海豚的后代。
B 跟公母没关系，难道当爸爸的不管孩子了吗。
C 有吃的就挺好的了，还管吃的鱼的种类么。
D 来几次和生命健康无关
E 爸妈没教孩子怎么自然捕食，丧失技能，因为人类喂养的食物只够他们一半的量，可能吃不饱。真可怜

(1) + (2)

x - y > -2, 2y - x > 6,相加得y > 4

Theorem X was proved by induction by several professors.
('induction' is one method used to prove mathematical theorems)

This chapter introduces induction, the method by which theorem X was proved by several professors.

is 2 more than X/8 这个怎么翻译啊 ？ 尴尬

结论：this insurance is partly responsible for the high rate of bank failures

C和E纠结
错选C- 里面偷偷夹了effect of price on， 如果没有这个限定还能C考虑考虑

方案题
目的：decrease the absentee rate
方案：fitness programs
CQ1 方案可行性问题 经常缺席的人都不想参与这个program

business 可以自己improve吗？难道不是被improve吗？

错选 B ， accident rate 是衡量一个年龄阶层safety的标准 不是 发生accident的driver数量

E错在哪里呢

分析了一下果因推理的和因果相关的本质，都是围绕着解释果，说的通俗易懂三个方向（1）：不是因造成的告诉我有别的原因 （2）有别的原因但是没告诉你具体是什么原因（3）：具体告诉你什么原因

感觉因果推理削弱可以把果否定了，然后对的选项可以解释为什么会是这样的否定果

P : swimmer a 高发 ； 泳池里有c
C ： 接触c导致swimmer的a高发
弱因果 找他因： swimmer的a高发率是因为 本身就有a才去swim
其他选项都没能完整涉及逻辑链结论

因果，因果相關性

因果，複因反方向

(1) ... emerged earlier than previously thought. (2) ... emerged earlier than that which was previously thought.(3) ... emerged earlier than that previously thought.
All three of those are 100% grammatically correct. Option #1 says this idea with the fewest words, and options #2 & #3 say the same thing with more words than needed. Saying anything with more words than needed is always wrong on the GMAT SC.

还是C将两段的关系弄错了
E表达的两段关系是并列。
但是C表达却是第二段比第一段重要。