44. (26787-!-item-!-188;#058&002971)
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 选D, 有人说,B中的producing要和mining平行,必须要加in, 这么看来,也不是必须的。
[此贴子已经被作者于2008-6-14 12:01:42编辑过] |