高等继续教育 / 护理英语II
正确率：100%
题型描述: 单选题
By the age of ( ) , an individual’s height usually has doubled the birth length.
A.1
B.2
C.3
D.4
By the age of ( ) , an individual’s height usually has doubled the birth length.
A.1
B.2
C.3
D.4
参考答案：