B vitamins C and E.
D antiviral substances.
A To reduce the rate of babies born too early.
C To reduce fetal deaths in pregnant women infected with HIV.
4. What a role do lymphocytes play in the human body?
B To raise the bodys immunity against infection.
D To help prevent the development of diabetes.
A Less than8%.
C 1.5%.
答案: C,D,A,B,A
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