Vitamin D deficiency rickets less prone to occur in: () A: infants of rapid development B: milk-fed infants C: breastfed infants D: less outdoor activities children E: infants with chronic diarrhea

In Indonesia, infants remain in close contact with their mothers and are carried everywhere.

Infants begin learning____________________________(自出生的一刻起).

中国大学MOOC: The most common disease in sheep milk-fed infants is:

中国大学MOOC: Infants’ticket fare in domestic flights is ________ of the normal adult fare.

When do infants begin to use cooing sounds to test loudness and pitch of a language?

Infants are, to some extent, spared the torment of fear or anxiety because they can't reason or foresee the future.

Human infants are born with some culture. They must not be transformed by their parents, teachers, and others into cultural and socially adept animals._

If infants learn two languages at the same time, they will have a sense of confusion, thus hindering the speed of the language learning.

Frolicking infants, school children playing tag, and adult arm wrestlers are demonstrating strong and trans-species bonds with the universe of animal.