【判断题】To pronounce /n/ and /ŋ/, we both need to raise our tongue tip to the roof of the mouth.
【判断题】To pronounce /n/ and / ŋ /, we both need to raise our tongue tip to the roof of the mouth.
【判断题】To make the sound /m/, we must open our mouth and raise our tongue tip to the roof of the mouth.
【判断题】To make the sound /m/, we must open our mouth and raise our tongue tip to the roof of the mouth.
【简答题】如下图所示,在 ABC中,∠B=∠C,PD⊥BC,DE⊥AB,∠AFD=158°,则∠ACD= _____________度。