prep2-9 比较 9. (24819-!-item-!-188;#058&001693)
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.
(A) as little risk as one in a million chances to cause (B) as little risk as one chance in a million of causing (C) as little risk as one chance in a million that it will cause (D) a risk as little as one chance in a million for causing (E) a risk as little as one chance in a million for it to cause
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