gwd 6-39，比较题跪求详解

carolcai

Q39:

Plants are more efficient at acquiring carbon than are fungi, in the form of carbon dioxide, and converting it to energy-rich sugars.

 

1. Plants are more efficient at acquiring carbon than are fungi
2. Plants are more efficient at acquiring carbon than fungi
3. Plants are more efficient than fungi at acquiring carbon

4. Plants, more efficient than fungi at acquiring carbon
5. Plants acquire carbon more efficiently than fungi

答案是c。我还是不太分得清c和b的区别，有没有高人指点下比较的要点啊？我每次都会错，不知道哪该省略，哪不能省。b为什么不对啊

youyou3941

很简单啊，b会造成carbon和fungi对比的歧义

carolcai

o ,thanks a lot

christo

顺便问一下，A是错在第二个are上吗？如果改为is呢？

[此贴子已经被作者于2008-5-2 15:55:16编辑过]