版上700+的神人們好，
有個問題想請教大家，就是在比較結構中，more than/as..as的擺放位置
比方說像pp這題
Officials at the United States Mint believe that the Sacagawea dollar coin
will be used more as a substitute for four quarters rather than for the
dollar bill because its weight, only 8.1 grams, is far less than four
quarters, which weigh 5.67 grams each.
B) more as a substitute for four quarters than the dollar bill because it
weighs only 8.1 grams, far lighter than
C) as a substitute for four quarters more than for the dollar bill because it
weighs only 8.1 grams, far less than
我知道這題是比較受詞，所以要補出介係詞
我想問的是more放在as a substitute for的前面跟放在後面的差別是什麼?
另外還有一題
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.
(B) as little risk as one chance in a million of causing
(D) a risk as little as one chance in a million for causing
像是這題a risk放在as...as裡面跟放在外面的差別是什麼？
我知道網路上大部分解題，包括曼哈頓都好像不是以這個為解題點
但我真的很想了解這部分的差異是什麼~還請大家幫忙解答，謝謝!