嗓子是教师讲课的“本钱”，嗓音失常，将明显影响讲课的质量与效果。因此，教师必须学会科学地用嗓和护嗓。 一．采用腹式呼吸，气从“丹田”出。吸气时小腹鼓起，呼气时小腹收缩。气似乎是从“丹田”发出的。这样，既声音洪亮，又不易疲乏。 二．适当张大嘴说话。整个发声通 The nephew is the “capital” of the teacher’s lecture. If the voice is abnormal, it will obviously affect the quality and effect of the lecture. Therefore, teachers must learn to use crickets and guardians scientifically. one. With abdominal breathing, gas comes out from “Tiantian”. When you inhale, your lower abdomen bulges and your lower abdomen contracts when you exhale. Qi seems to have been sent from “Tiantian.” In this way, the voice is loud and not easily fatigued. two. Properly open mouth to speak. The entire sound through