39. There is evidence that children may be harmed by ingesting
(A) three granules of sugar a day.
(B) the lead equivalent of three granules of sugar over 10 years.
(C) the lead equivalent of three granules of sugar a day.
(D) three granules of leaded paint dust.
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統計: A(14), B(6), C(40), D(7), E(0) #2717418
統計: A(14), B(6), C(40), D(7), E(0) #2717418