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.
164.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.
我有一个疑问,是关于这个as...as中间加名词的。 我们知道,as...as中间是可以加入名词的,例如下面这个句子: I haven't seen as old a car as this for years.
并且在这个句子中seen是个及物动词,后面是要跟名词性成分的,但是这个句子中还是直接跟了一个as..as结构,但是这个名词性成分夹在了两个as之间。 那么再回到这个题目,prep对于后面几个选项的解释是说at是个介词,后面要跟名词性成分,我觉得这个说法就站不住脚了。。。所以我不太明白C为什么是错误的。 另外一个问题是把上面这个句子改写一下: ...is effective at as low as -30 degrees Fahrenheit.不知道这个句子对么?
X is effective at temperatures ________. 后面"as low as blabla" 是形容temperatures,所以整个都要放在temperatures后面。
如果是C,你可以直接说: X is effective at low temperatures. 或者 X is effective at low temperatures measured at -30 degrees Fahrenheit or lower.