2. 外语
  3. A. direct contact with infected blood B. from 2 to 15 or more years after becoming infected C. without symptoms D. acquired i

A. direct contact with infected blood B. from 2 to 15 or more years after becoming infected C. without symptoms D. acquired i

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问题 A. direct contact with infected blood
B. from 2 to 15 or more years after becoming infected
C. without symptoms
D. acquired immuno-deficiency syndrome
E. live in the same room with an HIV-infected roommate
F. breast-feeding
HIV is transmitted in three ways: sexual intercourse, transmission from an infected woman to her fetus or baby and______.
选项
答案A
解析 见第五段，“Researchers have identified three ways in which HIV is transmitted：sexual intercourse, direct contact with infected blood, and transmission from an infected woman ot her fetus or baby.”
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