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Reasons why adolescents' reproductive health risks are higher than those of adults, except

Reasons why adolescents' reproductive health risks are higher than those of adults, except
A.Masturbation （自慰）
B.Unprotected sex behaviours
C.Lack of sexual knowledge
D.Sexual concepts is open
正确答案：Masturbation （自慰）
标签：性与生殖
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