影视艺术中音乐的作用主要体现为（）；（）；（）和创造节奏。
参考答案：抒发感情、参与叙事、展现环境
________ more careful, his ship would not have sunk.
A．If the captain were
B．Had the captain been
C．Should the captain be
D．If the captain would have been
下列不属于毛舌的病因的是（）。
A.口腔环境不佳
B.菌丛变化
C.缺乏舌运动
D.食物和唾液酸性增高
E.不良义齿刺激
