Gas hydrates, chemical compounds of water and natural gas, are increasingly being studied for their potential to be huge reservoirs of energy, possibly causing sea floor instability, and significant contributors to global warming.
- to be huge reservoirs of energy, possibly causing sea floor instability, and
- to be huge reservoirs of energy, possibly causing sea floor instability, and even as
- as huge reservoirs of energy, possibly causing sea floor instability, and
- as huge reservoirs of energy, and the possible cause of sea floor instability,
- as huge reservoirs of energy, as possible causes of sea floor instability, and even as
答案给的是A,又说有争议选C, 我认为应该选E 首先,potential的习惯用法是potential for,而不是potential to(参见大全239、300、391),所以我认为这里后接as更好,这里as作“作为”解,表示“作为...的潜力” 再者,A和C中possibly causing sea floor instability被用来表示伴随前面的动作或前面动作的结果,但从逻辑意思看,这部分与前面的任何动作都不构成伴随或因果关系 而E当中,as reservoirs, as causes, and as contributors构成了十分对称的平行,所以更象是正确答案 Open to discussion |