I have a new schoolbag. It is beautiful. It is yellow and blue. I like it vey much. But my schoolbag is very heavy. There are many things in my schoolbag. Look, what's in it?

    I have two books, a notebook, four pencils, two crayons, a ruler, and an apple in my schoolbag.

根据课文内容回答问题，将问题的答案填写在横线上。

悠扬的琴声靠的是琴弦的____ 产生的；将要上钩的鱼，会被岸上的说话声或脚步声吓跑，表明____ 能够传声。