試題詳解

41. It is important for pregnant women to consume folic acid supplements because______.  
(A) the fetus is not able to acquire oxygen by breathing on its own
(B) the fetus stores folic acid in high quantities
(C)folic acid deprivation is associated with neural tube defects in a fetus
(D) folic acid deprivation is a cause of heart abnormalities in a newborn