[求助]新prep2，164

164.       (25432-!-item-!-188;#058&001434)

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

温度可以和-30比？

c有何不可？

温度是跟–30 degrees Fahrenheit（华氏-30度）在比；另外at temperatures就是一种固定搭配，表示一种温度的状态，比方Water freezes at 0 degree celsious.

介词后面当然是跟名词啦，at as...这像什么样子啊...

但是我总觉得前面温度是一个定义，后面多少度是一个具体数，两者可比不像是gmac爱较真的性格。。。

也许是自己较真了。。。

at as错是否是因为连续两个介词犯忌了呢？

介词后面都是跟名词性的词或短语