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Scientists at the Los Alamos National Laboratory have succeeded for the first time in mining heat from the Earth's interior and producing energy on a commercial scale, enough for efficient generation of electricity and heating factories and homes.

正确答案: D

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楼主
发表于 2007-7-4 19:31:00 | 只看该作者

prep-36

36.  Scientists at the Los Alamos National Laboratory have succeeded for the first time in mining heat from the Earth’s interior and producing energy on a commercial scale, enough for efficient generation of electricity and heating factories and homes.

A. and producing energy on a commercial scale, enough for efficient generation of electricity and heating

B. and producing enough energy on a commercial scale for electricity to be generated efficiently and to heat

C. for energy production on a commercial scale, enough for generating electricity efficiently and to heat

D. to produce energy on a commercial scale, enough for generating electricity efficiently and for heating

E. to produce enough energy on a commercial scale for efficient generation of electricity and heat

the answer is D

I'm quite uncomfortable with the "enough for" in answer D...any NN could help to explain the usage? thanks.

沙发
发表于 2007-7-5 20:57:00 | 只看该作者
enough for很顺阿,很自然阿。足够用来发电和供暖
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