问题
单项选择题
Which of the following observations signals the onset of puberty in male adolescents
A.Appearance of pubic hair.
B.Appearance of axillary hair.
C.Testicular enlargement.
D.Nocturnal emissions.
答案
参考答案:C
解析:Testicular enlargement signifies the onset of puberty in the male adolescent. Then sexual development progresses, causing the appearance of pubic hair and axillary hair and the onset of nocturnal emissions.