求助 旧prep2 第5题（algae Antarctic snow） 谢谢谢谢谢~

catherine66

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

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A 可以想明白 但是觉得C也对
求解答 多谢

ruizm

同问

tommy8163

有两个条件促成high algae，一个是enough sunlight，另一个是enough seawater,在sunlight不多的时候，只能假设seawater是多的，也就不用多想了

bonnie0715

题目说ice上层的水藻，长得好因为阳光好（阳光穿透了薄的冰），营养好（下面水里的营养被吸收）。到这里可以退出，如果说上面冰太厚，那么阳光穿透的少就会导致阳光不好，如果太薄，水藻接触水少营养就不够。题目说，雪很厚啊（潜台词就是阳光少）但为什么它还是长得那么好呢？因为雪厚了把它压下去了营养就好了丫。
而C说，温度高的时候不会下雪，学就会少。管它什么事啊。已经很厚了。完全风马牛不相及么。

小伊YSY

E呢？有没有大侠跟我说下E的问题……还是说我没看懂这个？

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

黄宋菠菜

无关比较吖 好好想想