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Ozone in the stratosphere blocks deadly ultraviolet rays from the sun, but chlorofluorocarbons (CFCs) in aerosols and other products have thinned this protective layer. Evidence of this is the ozone hole that forms over the South Pole every Antarctic spring as temperatures drop below – 78 ° C, the temperature at which ozone depletion occurs. Measurements of the ozone hole taken at various times this spring show that, compared with the same times the previous year, its area diminished by four million square kilometers. Nevertheless, scientists have not concluded that the ozone layer is recovering.
Which of the following would, if true, provide the strongest reason for the scientists’ reaction to the measurements?
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
温度降低，臭氧层洞变大
现在和previous years相比，洞变小了
但是科学家结论：洞没有变小
支持--D 他因 天气模式让不寻常的暖空气混入极圈了this year （warm air,this year分别对应题干的-78℃temperature，和杰伦的previous year）
E 氟利昂毁坏的能力会持续75-100年。 --这个其实是过渡架桥，很有迷惑性，1.可能今年的洞变小影响不大2.也有可能既然氟利昂一直影响持久，洞变小则表现出一种可预料持续进行的趋势
A 只是一个重复的表述
B 削弱 不停变动
C 削弱 已经禁止了很多年都还是恶化，今年却突然好转
kikigmat780
这个解析在说啥呢 = = 南极上空的臭氧洞形成： 在春天温度低于-78度的时候。 今天春天，经过好几次测量发现：洞比去年减少了4 million square kilometer 结论：但科学家不认为 臭氧洞在慢慢恢复 选项需要支持为什么科学家不认为臭氧洞在回复 A The ozone hole has steadily grown in size every year for the past decade except this year. 【过去尺寸在增加，今年没有在增加，没解释为什么尺寸减小了不算恢复】 B The length of time that the ozone hole persists fluctuates from year to year.【臭氧洞的持续时间每年不定，也没有解释为什么减小了不算恢复，今年持续20天，去年持续15天又能怎么样呢，只能说明时间对洞的大小不构成影响，但gap是要解释的是 尺寸和恢复的关系】 C As a result of international treaties, CFCs have been completely banned for several years.【banned for several years，对今年和去年的影响是一样的，不构成差异】 D Weather patterns allowed unusual amounts of warm air to mix into the polar regions this year.【今年的暖风不断混入，温度影响洞的形成，只有温度<-78度才有臭氧洞，构成他因解释洞在缩小的原因，支持科学家认为不是由于洞在恢复的原因】 E Human-made CFCs retain their ability to destroy ozone molecules for seventy-five to one hundred years.【 for seventy-five to one hundred years，对今年和去年的影响是一样的，不构成差异】
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回复
2022-03-16 22:19:20
贾思敏
注意原文：Evidence of this is the ozone hole that forms over the South Pole every Antarctic spring as temperatures drop below –78°C, the temperature at which ozone depletion occurs. 说的是臭氧空洞的形成需要温度下降到非常低的温度即-78度。因此D选项说的今年极地地区进入了非常多的暖空气，那么就达不到空洞形成的条件，因此这个原因解释了今年空洞变小，而不是【ozone layer is recovering】这个原因
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2021-10-10 18:26:27
186866kzqn
增强类 结论：臭氧层空洞相较去年变小的原因不是因为自我修复 原因：未提供（需要根据背景信息推断） 背景信息：CFC稀释臭氧层；温度低于-78度，臭氧层形成空洞 因此，可以推断可能的原因是CFC含量的下降或者温度的升高。C没有体现今年和去年的差异化，排除。
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2021-09-22 19:28:47
632530aeusq
D他因排除，较B更直接。
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2021-08-26 15:09:47
170605ehvb
the ozone hole that forms over the South Pole every Antarctic spring as temperatures drop below –78°C，今年有暖气流，所以小了
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2021-05-28 21:28:19
Mariposa爱学习
今年臭氧层漏洞比起以前小了，但科学家却并不认为臭氧层是在恢复。突发事件，要用变量解释 也就是说科学家觉得hole变小可能只是暂时的，那么就要考虑是一些随机性的原因导致今年的比较小 E选项：CFC对臭氧层的破坏会持续75到100年---长期问题，无法解释为什么今年突然变小
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2020-11-13 15:41:53
498295bwd
注意原文：Evidence of this is the ozone hole that forms over the South Pole every Antarctic spring as temperatures drop below –78°C, the temperature at which ozone depletion occurs. 说的是臭氧空洞的形成需要温度下降到非常低的温度即-78度。因此D选项说的今年极地地区进入了非常多的暖空气，那么就达不到空洞形成的条件，因此这个原因解释了今年空洞变小，而不是【ozone layer is recovering】这个原因，属于他因削弱。削弱了【ozone layer is recovering】就是支持科学家，因为科学家反驳的点是【ozone layer is recovering】。 B选项信息不足。你觉得它可以支持大概率是因为你自己脑补了一些额外信息。比如说【如果判断臭氧层是否在恢复的标准包括持续时间】，且今年持续时间比去年长，那么可以削弱预期的论证。但是前面那个如果是我们自行脑补的，题干和选项并没有这些前提信息。
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2020-09-21 20:54:54
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