LZM书上第174的第47题

qqgf

Some phychiatric studies indicate that among distinguished artists [U]the rates of manic depression and major depression are ten to thirteen times as prevalent as in [/U]the population at large.
a.[U]the rates of manic depression and major depression are ten to thirteen times as prevalent as in
b.[U]the rates of manic depression and major depression are ten to thirteen times more prevalent than in
c.[U]the rates of manic depression and major depression are ten to thirteen times more prevalent when compared to
d.[U].manic depression and major depression are ten to thirteen times as prevalent when compared to
e.manic depression and major depression are ten to thirteen times more prevalent than in
correct answer:E what about A?
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Louisa_xy

发病率rates不能用prevalent修饰，rates 可以说great or low,疾病可以用prevalent修饰。排除A B C.
D as prevalent when compared to 这种结构是错误的。
E 是正确的。