5.infected with:感染上
练习:
1.How many babies are bom with low birth weight in the developed countries every year according to WHO?
A. 20,000,000.
B. 18,000,000.
C. 2,000,000.
D. 38,000,000.
2.A pill of multivitamins may contain all of the following substances EXCEPT
A. all vitamins in the B group.
B. vitamins C and E.
C. much iron and folate.
D. antiviral substances.
3.Which of the following is NOT one of the effects of multivitamins mentioned in the passage?
A. To reduce the rate of babies bom too early.
B. To reduce the risk of low birth weight.
C. To reduce fetal deaths in pregnant women infected with HTV.
D. To increase the number of lymphocytes in mothers blood.
4.What a role do lymphocytes play in the human body?
A. To reduce the rate of dying while still a fetus.
B. To raise the bodys immunity against infection.
C. To help prevent the development of heart disease.
D. To help prevent the development of diabetes.
5.How many percent of babies were bom with low birth weight to women who were not infected with the AIDS virus and took the multivitamins according to a new study?
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