兩題 黃金閱讀 問題T^T - 英檢

※ 引述《JDudley (達利)》之銘言：
: Green Iceberg
The ice shelf cores, with a total length of 215 meters (705 feet), were long
enough to penetrate through glacial ice—which is formed from the compaction
of snow and contains air bubbles—and to continue into the clear, bubble-free
ice formed from seawater that freezes onto the bottom of the glacial ice. The
properties of this clear sea ice were very similar to the ice from the green
iceberg. The scientists concluded that green icebergs form when a two-layer
block of shelf ice breaks away and capsizes (turns upside down), exposing the
bubble-free shelf ice that was formed from seawater.

6. According to paragraph 4, ice shelf cores helped scientists explain the
formation of green icebergs by showing that
○the ice at the bottom of green icebergs is bubble-free ice formed from
frozen seawater
○bubble-free ice is found at the top of the ice shelf
○glacial ice is lighter and floats better than sea ice
○the clear sea ice at the bottom of the ice shelf is similar to ice from a
green iceberg

紫色部份為題目定位，答案在前一句。
原文說，在glacial ice底層乾淨又沒泡泡的冰，和綠冰山的冰，屬性很相似。
所以科學家就推論說，綠冰山就是從這裡來的。（glacial ice大翻轉之後）
答案（d）幾乎與原文相同。

答案（a）：剛好與原文相反。
答案（b）：剛好與原文相反。
答案（c）：原文沒有這樣的比較。

: 答案是4
: 這題我完全看不出來關鍵在哪裡耶
: 增亮的那句要怎解啊??

先忽略, with a total length ...,和
－which is formed ... －等，補充說明的詞句，
應該就不難理解了。

Paragraph 4: A green iceberg that stranded just west of the Amery Ice Shelf
showed two distinct layers: bubbly blue-white ice and bubble-free green ice
separated by a one-meter-long ice layer containing sediments. The green ice
portion was textured by seawater erosion. Where cracks were present, the
color was light green because of light scattering; where no cracks were
present, the color was dark green. No air bubbles were present in the green
ice, suggesting that the ice was not formed from the compression of snow but
instead from the freezing of seawater. Large concentrations of single-celled
organisms with green pigments (coloring substances) occur along the edges of
the ice shelves in this region, and the seawater is rich in their decomposing
organic material. The green iceberg did not contain large amounts of
particles from these organisms, but the ice had accumulated dissolved organic
matter from the seawater. It appears that unlike salt, dissolved organic
substances are not excluded from the ice in the freezing process. Analysis
shows that the dissolved organic material absorbs enough blue wavelengths
from solar light to make the ice appear green.

7. Why does the author mention that “The green ice portion was textured by
seawater erosion”?
○To explain why cracks in the iceberg appeared light green instead of dark
green
○To suggest that green ice is more easily eroded by seawater than white ice
is
○To support the idea that the green ice had been the bottom layer before
capsizing
○To explain how the air bubbles had been removed from the green ice

紫色為題目定位，答案在前一句。
這題我覺得很狡猾，看準考生會想太多，但實際上答案很單純。
題目那句話是說「綠色冰的部份因受海水侵蝕而產生紋路」（大概意思）
何謂「綠色冰的部份」？就是指前一句的「兩層」，藍白冰和綠色冰。
所以就支持了「原本綠色冰是在下層（泡在海水裡）」的說法。
答案（c）。

答案（a）：呈現淡綠色的又不是cracks。
答案（b）：原文沒有講說誰比較容易被海水侵蝕。
答案（d）：原文沒有解釋泡泡如何被移出綠色冰。

: 這題我選1 因為1是我唯一可以看得出來的內容
: 我也知道一定不會是要問這麼簡單的東西 囧 但是就是不敢選其他的
: 但為什麼是3啊??
: 考試的時候應該怎麼樣去找關鍵句呢?
: 拜託各位大大提供解法
: 謝謝 <(_ _)>

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