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I will choose B. The whole phrase after comma functions as modifier of the subject "sound". "Sound' cannot perform the action of preventing. So we can say bye-bye to answer choice C, D, and E. "acoustic energy" was dissipated by the special feature of the sea. So A is out.
以下是引用hujin2000在2007-12-10 9:59:00的发言：Sound can travel through water for enormous distances,
prevented from dissipating its acoustic energy as a result of
boundaries in the ocean created by water layers of different
temperatures and densities.
A.prevented from dissipating its acoustic energy as a
result of
B.prevented from having its acoustic energy dissipated by
C.its acoustic energy prevented from dissipating by
D.its acoustic energy prevented from being dissipated as
a result of
E preventing its acoustic energy from dissipating by
I selected E. "dissipate" can be both vi.消散 or vt.使消散
please advise.
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发表于 2007-12-10 09:59:00
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