GWD26-Q37

kun861010 · 发表于 2009-12-27 02:52:09

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

答案是a，但是e为什么不对呢？dissipating by 后面的东西，好像跟清楚一点

GWD26-Q37

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