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【OG20-P580-669题】
Rainwater contains hydrogen of a heavy form called deuterium. The deuterium content of wood reflects the deuterium content of rainwater available to trees during their growth. Wood from trees that grew between 16,000 and 24,000 years ago in North America contains significantly more deuterium than wood from trees growing today. But water trapped in several North American caves that formed during that same early period contains significantly less deuterium than rainwater in North America contains today.
Which of the following, if true, most helps to reconcile the two findings?
分析A选项
分析B选项
分析C选项
分析D选项
分析E选项
我有更好的解析 
暂无雷哥网文字解析
题型：explain
原文大意：雨水包含了重氢。树木里重氢反映了树木生长会吸收雨水里的重氢。16000到24000年前生长的树里重氢含量比现在的多，但那段时间形成的洞穴留下的水里重氢含量比现在少。
逻辑链：
wood---rain
|
cave
选项解析：
A.洞穴里除了水其他地方没有重氢。排除水里重氢被分散走的可能，不能解释
B.树死掉之后遇到水不改变其含重氢量。排除他因，无法解释
C.过去一百年间工业化改变了雨水含重氢量。无法解释
D.树生长中吸收地表水，而洞穴里的水可能是洞穴形成前的雨水。所以那段时间形成的洞穴里面的水不是那段时间的，而那段时间的树吸收的才是那段时间的雨水，因此洞穴里的水和那段时间的树吸收的水无关，可以解释，正确
E.含d量高的树不会比低的树留的久。无关
suzzie
我真服了
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2023-01-25 14:12:12
-Sherry
和过去现在，含量多少都没关系；和wood和cave的区别有关系
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2022-12-14 16:11:28
330556cvcx
过去一百年间工业化改变了雨水含重氢量。无法解释. 补充一下，C答案的问题只说了改变，但没有说清一百年后雨水的D含量是变多还是变少，如果是变少了，和就不能作为调和原文的解释了。
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2022-06-25 17:05:09
ElisaGo
注意雨水和洞穴水地区别，树氚含量反映树吸收雨水量，之前洞穴里的树氚含量比较少，是因为吸收了洞穴里的水多，而洞穴里水的形成可能早就有了，说明雨水量是一致的，只是树吸收水的来源不一样所以导致了氚的浓度不一样
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2022-04-16 10:54:25
冲他丫的
rainwater-d-wood C改变雨浓度和水无关啊 不要脑补
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2021-10-20 16:37:03
660976qkft
解释题，指出两者不同，就行
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2021-09-29 15:06:15
贾思敏
题型：helps to reconcile，题干中间有But，有矛盾点 - 解释题 方法：使矛盾合理化，给矛盾点找个合理的解释 逻辑链：早期trees含有的d物质比现在tree含有的多 - 但早期在cave里留下的water含d物质比现在的少。 为什么呢？为什么cave洞穴留下的水含的d物质要比现在的少呢？D选项：树生长中吸收shallow groundwater from rain地下水，而洞穴里的水water trapped in caves可能是洞穴形成前的雨水。所以那段时间形成的洞穴里面的水不是那段时间的，而那段时间的树吸收的才是那段时间的雨水，因此洞穴里的水和那段时间的树吸收的水无关，可以解释，正确，很绕，就是排他增强嘛，就是说早期树含有的水 和 water trapped in caves洞穴里面的水 是两回事（形成时间和来源根本不一样）
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2021-09-21 16:48:22
Audreeyy
雨水中含有一种叫做氘的重氢。木材的氘含量反映了树木在生长过程中可获得的雨水中的氘含量。 16,000 到 24,000 年前在北美生长的树木的木材比今天生长的树木的木材含有更多的氘。但是，在同一早期形成的几个北美洞穴中被困的水所含的氘比今天北美雨水所含的氘要少得多。
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2021-08-26 09:42:06
Tesia
简化为比较＋解释题，比较了树和洞穴，同时又要解释为什么氢的含量变化相反，只有D连接两者对比同时给出解释。
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2021-06-09 00:45:55
Mariposa爱学习
雨水中含有d 树木含有的d--能够反映生长过程中雨水的d含量多少 2万年前的树包含的d>现在的树包含的d 和树同时期形成的洞穴内水含有的d<现在雨水中含有的d 洞穴内的水可能来自不同的雨水，先于树形成
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2020-11-19 16:30:15
158706lvuy
逻辑：因1-树中含D量高=树生长时接触到的雨水中D含量高，因2-树中D的含量过去高于现在，果-雨水中D的含量过去高于现在。 矛盾：果'-洞穴中水中D含量过去小于现在。 样本的代表性问题：洞穴中的水能代表当时的雨水吗？
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2020-09-19 15:47:43
又大又圆肉包打狗后没了
前提：木头中的含量反应雨水中的含量；矛盾：树木比现在含量高，洞穴水比现在含量低；GAP：雨水=洞穴水？能回答此问题的选项：D
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2019-11-20 23:14:32
鹿小陆
我终于看懂了楼上的长篇大论：简短概括一下 其实Jennifer说的3点灰常有逻辑， “1.需要注意原文that formed during that same early period形容的是caves，而不是water，也就是只要能指出caves中的水并不是caves形成时期的水就可以轻松解释这个“矛盾”了” 我的想法是： 既然 caves根本不是wood/tree，那caves怎么可以沿用wood的逻辑呢 wood中D%=同期水中D% caves中D% 可不一定等于同期流经caves的水中D%
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2019-11-01 00:37:51
度过
根据题目最后一句话的意思，这道题需要把时间和地形这两个因素给结合起来。 同时在阅读题目的时候要注意题目所问的问题是什么？题目所问的问题是——如何将两种观点给协调结合起来，也就是说这两种观点本身的事实应当是正确的。
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2019-09-30 20:54:58
浪逐曲奇
分享这个题目的逻辑其实我没有理顺，现在也没有很看懂。不过我做题时的感觉是，木头中的d反映树木能收到的水中d的含量，两者有联系。一般树木老一些，d含量高一些。然而这个地方水中d含量高一些（我当时做题没有看到in the cave这个定语，汗-_-||）。那就要有一个答案解释木头和这里水的不同之处{解释题是找变化}，像下面大牛评论的一样，找一个同时有木头有水还能说出两者不同的选项，基本是答案了，其他答案我乍一看不相关（虽然它估计真的相关 我却没看懂这一相关性体现的地方。。。）
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2019-08-11 12:09:23
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