扫描二维码，直接登录
题库 / OG2019-SC-691
To estimate the expansion rate of the universe is a notoriously difficult problem because there is a lack of a single yardstick that all distances can be measured by.
To estimate the expansion rate of the universe is a notoriously difficult problem because there is a lack of a single yardstick that all distances can be measured by.
Estimating the expansion rate of the universe is a notoriously difficult problem because there is no single yardstick by which all distances can be measured.
Because there is a lack of a single yardstick to measure all distances by, estimating the expansion rate of the universe is a notoriously difficult problem.
A notoriously difficult problem is to estimate the expansion rate of the universe because a single yardstick is lacking by which all distances can be measured.
It is a notoriously difficult problem to estimate the expansion rate of the universe because by no single yardstick can all distances be measured.
题目分析：此题存在一个因果联系。即“因为没有标尺，所以估计宇宙的膨胀速度是个难题”。
选项分析：
A选项：because之后跟着一个there be句型，其核心成分为“there is a lack”，即“这里有一个缺少”。但直接导致“估计速度是个难题的”应该是“没有标尺”这件事，而不仅仅是“这里有个缺少”。
B选项：正确。because之后的核心成分为“there is no yardstick”，即“这里无标尺”。
C选项：there is a lack错误同A。
D选项：此选项的字面意思为“因为标尺正在缺少，所以难题 是 预估速度这件事”。很明显，“正在缺少”这一进行时是不合理的，且“标尺缺少”导致的应该是“ 预估速度这件事 是 难题”，而不是“难题 是 预估速度这件事”。
E选项：主句中，it作形式主语，指代“预估速度”这件事。原因状语从句中，是一个倒装，还原一下为“all distances can be measured by no single yardstick.” 其字面意思为“所有的距离可以被 没有任何一个标尺 测量 ”。那么整句话的核心意思为“因为被测量，所以是难题”。但合理的应该是“因为没标尺，所以是难题”。
按照毕出老师的书可以将本题看作考核了以下几个考点
1. 逻辑论元（核心词变换）
首先发现本题选项中原因状语部分的核心词发生了变化
A中核心词是lack
BD中核心词是no single yardstick
C中核心词是lack
E的核心词通过还原到装： all distances can be measured by no single yardstick发现核心词是一个动作“可以被测量”
逻辑上来说是因为没有度量所以是个难题，因此排除ACE
2. 范畴逻辑
difficult problem的范围大于estimate the expansion rate of the universe ，因此应该将前者放在后面，因此排除D
最后答案是B
登录 或 注册 后可以参加讨论