When the unit is spoken in the ______, the fall in pitch normall

When the unit is spoken in the ______, the fall in pitch normally occurs on the last stressed syllable.
A、fallingtone
B、risingtone
C、flat regulation
D、tuo dang
【正确答案】：A
【题目解析】：When the unit is spoken in the fallingtone, the fall in pitch normally occurs on the last stressed syllable.