求助语法 新PREP 第二部分的 164题

lavendern

Mixed with an equal part of water, ethylene glycol, a compound commonly used as an automotive antifreeze, is effective at temperatures as low as –30 degrees Fahrenheit.
A.    temperatures as low
B.    temperatures so low
C.    as low temperatures
D.    as few            
E.    as little

答案选A。 说C是错误选项，给出的解释是at后面需要宾语。但是随后的考点中讲as+adj.+零冠词+复数可数名词+as I don't smoke as expenesive cigarettes as those.  这里cigarettes不也是宾语吗。。。
还有这个例子as+adj.+不定冠词+单数可数+as   I haven't seen as old a car as this for years.

凌乱了~~~

erok

个人感觉，选c的话30 degrees F 就是在解释（或者说平行）temperatures了，单复数不合理。

qq341163712

is effective at 这个后面必须得跟个名词的嘞 因为at是介词
所以不能直接再后面接C选项as low temperatures
不然就成了is effective at as low temperatures as –30 degrees Fahrenheit
话说LZ要是还不明白就记住，介词的意义就是在后面加名词的= =，不然就不叫介词啦

lavendern

啊~~~好像是存在单复数统一的问题~~~

lavendern

is effective at 这个后面必须得跟个名词的嘞 因为at是介词
所以不能直接再后面接C选项as low temperatures
不然就成了is effective at as low temperatures as –30 degrees Fahrenheit
话说LZ要是还不明白就记住，介词的意义就是在后面加名词的= =，不然就不叫介词啦

-- by 会员 qq341163712 (2012/4/9 11:09:17)

那see smoke这样的动词就可以不直接加名词了吗？