3 This is the first study to show how _____ to air pollution influences cognitive function in a national
sample of older men and women.
(A) examination
(B) expiration
(C) exposure
(D) expansion

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統計： A(0), B(0), C(0), D(1), E(0) #3461617

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題目：這是第一項研究顯示_______...
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