But in reality the federal government continued to negotiate formal tribal agreements past the turn of the century, treating these documents not as treaties with sovereign nations requiring ratification by the Senate but simply as legislation to be passed by both houses of Congress.

Finally, socialist feminists and most bourgeois feminists concurred in subordinating women's emancipation to what they considered the more important goal of liberating the entire Russian population from political oppression, economic backwardness, and social injustice.

subordinate 下一级的次要的

B选项时态不正确 类似情形应该用相同的时态

A选项没有明确的因果关系
B选项伴随状语是正确的可以表达出逻辑关系，但是多了一个their
CE选项不存在ability of doing的用法

把握作者的态度，作者总体对density model是持有正态度的

At high density levels, however, competitive effects outweigh legitimation effects, discouraging foundings.

P2描述了一些不符合density dependence model的特例，并且给出了解释
choice e, defending the validity of a particular study's conclusions
定位Even within national contexts, studies have found more support for the density dependence model when they employ broader geographic units of analysis。这些studies的作用是为了support explanation for inconsistency

直接细节题：
定位other studies have found patterns not consistent with the model. A possible explanation for this inconsistency is that legitimation and competitive forces transcend national boundaries, while studies typically restrict their analysis to the national level.

1

Sufficient和enough同义词重复，with位置导致修饰歧义，可能修饰前面的the shuttle and earlier spacecraft也可能修饰后面的主句，改为定语从句可避免此问题

Not only…..but (also)表示的关系是递进, 其中also可以省略
But/but also表示的是转折.
即单独出现but also是可能的，此时表转折（注意语义关系还是转折）

whether or not的使用：(见the handbook of good english)
1) 在引导宾从的时候只能够用whether，而不能加or not，否则累赘
2) 在引导状从的时候必须加上or not，即whether or not.
whether表示列举时候的用法：Whether A, B, or C.

and…as well混搭累赘（但and also不累赘）；envisioning有具体的名词形式即vision，应直接用名词

(3) If the noun in question is already an explicitly numerical quantity, then you should use neither "much" nor "many". Instead, you should just use "twice" or "double" by itself. e.g., twice the increase --> "increase" is an explicitly numerical quantity

(1) If you say "twice as many", then this construction should be paired with acountable noun. e.g., twice as many dogs --> "dogs" is a countable noun
(2) If you said "twice as much", then this construction should be paired with anuncountable noun. e.g., twice as much water --> "water" is an uncountable noun

by sb形容的是动词
unqualifying释义: not meeting some sort of standard for qualification
unqualified释义: without any sort of restriction or reservation

* the present perfect (has/have VERBed) is used if the event still has a tangible impact or influence on, or relevance to, the present state of affairs.

* the simple past is used if the event does NOT have any tangible impact/influence/relevance in the present.

直接细节题：
choice d,way in which the 1890 census measured women's income levels and educational backgrounds。人口调查统计女性背景和教育背景的方式
定位1890时间点，发生的两件事1）每个家庭一个在家女性的人数，和职业女性两组之间的一个overlap重叠被正式计算出来；2）女性期待更精确的数据关于收入和职业
因此没有提及收入和职业的数据用什么方式去收集

occupational information about women that was provided by the United States census-a population count conducted each decade-became more detailed and precise in response to social changes
全文的主旨就是美国人口统计提供的女性信息在过去的每十年中，出于应对社会的变化，变得更加具体和精确。

从技巧而言，原题说stroke的影响，答案完全不提基本是错的。

1. the same as : 要注意 比較對象要同類
2. 主動一致性 makes vs make
3. while but 核心轉移
https://mp.weixin.qq.com/s/a1UcjwfJ2H6WccxpqxGlxA?