黃金閱讀Petroleum Resources - 英檢

Paragraph 4: As oil becomes increasingly difficult to find, the search for it
is extended into more-hostile environments. The development of the oil field
on the North Slope of Alaska and the construction of the Alaska pipeline are
examples of the great expense and difficulty involved in new oil discoveries.
Offshore drilling platforms extend the search for oil to the ocean's
continental shelves—those gently sloping submarine regions at the edges of
the continents. More than one-quarter of the world's oil and almost one-fifth
of the world's natural gas come from offshore, even though offshore drilling
is six to seven times more expensive than drilling on land. A significant
part of this oil and gas comes from under the North Sea between Great Britain
and Norway.
Paragraph 5: Of course, there is far more oil underground than can be
recovered. It may be in a pool too small or too far from a potential market
to justify the expense of drilling. Some oil lies under regions where
drilling is forbidden, such as national parks or other public lands. Even
given the best extraction techniques, only about 30 to 40 percent of the oil
in a given pool can be brought to the surface. The rest is far too difficult
to extract and has to remain underground.


8．What does the development of the Alaskan oil field mentioned in paragraph
4 demonstrate?
○More oil is extracted from the sea than from land.
○Drilling for oil requires major financial investments.
○The global demand for oil has increased over the years.
○The North Slope of Alaska has substantial amounts of oil.


為什麼答案是B, 而非C呢？

C似乎也言之成理。如果不是國際對石油的需求增加，何以需要在阿拉司加開墾油田？

有沒有高手可以解惑？

感恩。




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