音调跟发声体振动的____有关; 响度跟发声体的____有关; 有时形容某一个歌唱家的声音很高,实质是说歌唱家声音的____.
50分米=____米
——Which sport do you like better, swimming or playing basketball?——I prefer ______ to _______. I don't like water sports.
人体饮食中长期缺少碘会患地方性甲状腺肿(俗称“大脖子病”).