高等继续教育 / 护理英语II
正确率：100%
题型描述: 单选题
50% of our normal taste buds disappear by the age of ( ).
A.80
B.70
C.50
D.60
50% of our normal taste buds disappear by the age of ( ).
A.80
B.70
C.50
D.60
参考答案：