What is the significance of the study talked about in this passage? A.It proved the assumption on BPA that studies previously． B.It clarified the high risks that BPA may pose to peoples health． C.It confirmed the principal source of the substance BPA. D.It showed whats responsible for the rising level of BPA in humans.
A.It B. B.It C. C.It D. D.It E.
【参考答案】
D D)。定位：由题干中的thesignificanceofthestudy定位到原文未段．-．．thisstu......