07PREP-5.(24305-!-item-!-188;#058&001204)

ssxxtt27

Microscopic plants called algae grow inside the top layer of sea ice in the Antarctic if enough sunlight reaches that layer of ice and enough seawater, which contains nutrients, reaches that layer after splashing onto the surface.Even though moderate snow cover reduces the sunlight that filters into the top layer, sea ice with moderate snow cover typically contains even more algae in the top layer than does sea ice with less snow cover.

Which of the following, if true, most helps to explain the apparent discrepancy?

(A) As the weight of accumulated snow forces ice lower in the water, more seawater splashes onto the surface and seeps through the snow.

(B) Seawater in the Antarctic often contains higher concentrations of nutrients than does seawater in more temperate regions.

(C) As the air temperature around sea ice decreases during the winter, the likelihood decreases that snow will fall and thus add to any existing snow cover.

(D) The nutrients on which algae rely are common in seawater throughout the Antarctic.

(E) More sunlight filters through a layer of ice than through an equally thick layer of snow.

答案是A 我选的是E
A好奇怪啊。。。冰在水里被压得更低了，更多的海水溅到表面上，渗过积雪

PREMISE
1.enough sunlight reaches that layer of ice
2.enough seawater, which contains nutrients, reaches that layer after splashing onto the surface
E满足第一条啊。。。为什么不对？

hanshipeng

E, 题目没有提到a layer of ice. 只是说雪厚薄的区别。
A, 更厚的雪，压低了冰，是的海水更容易溅到上面，从促进algae的生长。

ssxxtt27

题目已经说了moderate snow cover reduces the sunlight that filters into the top layer 所以答案就没有必要再讨论这个了

raytry

本来是来看答案的，结果自己想明白了，解释一下吧~~虽然晚了一年，给后进者看吧：
帮助algea生长有2要素。1、阳光。2、海水的滋养。但是第1条件被限制的地方竟然有更多的algea，只能说明第2条件被加强了。所以看答案就是选A了。冰被雪压低后，使得更多的海水浸入上层的冰，创造了有力的条件

mtryshy

选e其实属于没读懂题，前后看似矛盾的题其实最好选，关键元素都得出现，并且能填补逻辑gap才行