It can be inferred from the passage that which of the following is true of the surface waters in the答案解析-雷哥GRE

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In a plausible but speculative scenario, oceanographer Douglas Martinson suggests that temperature increases caused by global warming would not significantly affect the stability of the Antarctic environment, where sea ice forms on the periphery of the continent in the autumn and winter and mostly disappears in the summer. True, less sea ice would form in the winter because global warming would cause temperatures to rise. However, Martinson argues, the effect of a warmer atmosphere may be offset as follows. The formation of sea ice causes the concentration of salt in surface waters to increase; less sea ice would mean a smaller increase in the concentration of salt. Less salty surface waters would be less dense and therefore less likely to sink and stir up deep water. The deep water, with all its stored heat, would rise to the surface at a slower rate. Thus, although the winter sea-ice cover might decrease, the surface waters would remain cold enough so that the decrease would not be excessive.

It can be inferred from the passage that which of the following is true of the surface waters in the current Antarctic environment?

(A) They are more affected by annual fluctuations in atmospheric temperatures than they would be if they were less salty. (B) They are less salty than they would be if global warming were to occur. (C) They are more likely to sink and stir up deep waters than they would be if atmospheric temperatures were to increase. (D) They are able to offset some of the effects of global warming beyond the Antarctic region. (E) They are less affected by the temperature of deep water than they would be if atmospheric temperatures were to increase.

正确答案： C 耗时：

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当前版本由 528904afvx 更新于2022-07-19 15:12:17 感谢由 528904afvx 对此题目的解答所做出的贡献。

Temperature increases = more salty surface water = C
当前版本由 289170qngr 更新于2021-11-02 15:43:53 感谢由 289170qngr 对此题目的解答所做出的贡献。

dm认为：升温不影响南极环境稳定让步：升温少有冰形成」m认为：升温影响会被抵消冰形成会导致海面盐多：少冰 -- 少盐少盐 -- 水密度低 ---不会下沉 or 卷起深层水深层水（贮藏热量）会较慢地升到表面结论：表面水会保持冷冰不会减少单词：periphery 外围 scenario 设想方案 C.【if修饰从句】They are more likely to sink and stir up deep waters than they would be（if atmospheric temperatures were to increase.）若if修饰主句则一般为放句首：If ….., they’re more likely to stir than they would be ….
当前版本由长颈鹿在哪里呀更新于2019-04-01 10:54:06 感谢由长颈鹿在哪里呀对此题目的解答所做出的贡献。

回到文中定位，less sea ice would mean a smaller increase in the concentration of salt. Less salty surface waters would be less dense and therefore less likely to sink and stir up deep water，温度上升，那么冰会减少，就更不可能sink and stir up deep water。而题干问现在的情况，相比温度高的时候，自然现在更能sink and stir up deep water。

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521059o

为啥D不对呀

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2023-05-08 17:17:00

521059o 回复 521059o
难道意思是现在是还没有全球变暖的情况吗，所以它含盐量还是比较高的，会下沉?

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2023-05-08 17:18:59
287566ng 回复 287566ng
我想应该是"beyond the Antarctic region"这里的beyond错了。D的意思是他可以抵消这片区域以外的全球变暖，而文中只提到了这片区域的。

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2023-05-10 23:04:35

小江要上USC

谢谢...看了三遍终于看明白了，than后面才是全球变暖的情况，所以我一开始选了b是因为因为than前面是全球变暖的情况！！玛德，gre，你好会坑人

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2022-10-30 16:59:37

小白馒头330

全文逻辑链：全球变暖-》less sea ice -〉 less surface salt -》less likely to sink and stir up deep water.-〉surface cold enough；所以选项c中：they would be if atmospheric temperatures were to increase的情况是全球变暖的情况，所以就是deep water卷不起来的情况；所以than前面就是more stir up的起来的情况！

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2022-10-18 01:36:37

Rey雷雅玟

一样是没注意到虚拟语气没看到than！ Damn有点气

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2021-05-27 21:22:40

Jwhu

虚拟语气没看对....

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2021-05-08 11:14:03

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