求大神解惑，这道题想半天了

MetroBooming

The Environmental Protection Agency frequently puts mandatory controls on toxic substances that present as little risk as one in a million chances to cause cancer.
Aas little risk as one in a million chances to cause
Bas little risk as one chance in a million of causing
Cas little risk as one chance in a million that it will cause
Da risk as little as one chance in a million for causing
Ea risk as little as one chance in a million for it to cause
我的答案：D
正确答案：B                        as as 这种结构不是比较对象要平行对等吗,这里我实在看不懂是个啥结构，有nn来解释一下吗

amarelle

as little as 这应该是一个习惯性用法
其实这个题应该就跟as little as possible这个表达差不多

mel102

如果D和E改成 a risk as little as one chance in a million of causing也就对了

Aznbadboy

这个考的重点是idiom但是不是as as, 而是risk of. 所以不是一个平行的题，平行是陷阱