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The oxidation number of N in N2H4 is
Anesthesia
A medical practice that uses drugs or other methods to prevent pain during surgery or other medical procedures.
Circumcision
The surgical removal of the foreskin from the male genitalia, often for religious, cultural, or medical reasons.
Developed Sense
A refined or highly developed capacity, such as sight, hearing, or taste, often resulting from learning or experience.
Newborn's Hearing
The auditory ability of a newborn baby, which begins to develop before birth and is fully functional shortly after birth for hearing sounds.
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