跳广场舞已经成为人们健身的一项运动，优美的舞曲声是由于扬声器纸盆的 ____产生的，是通过 ____传入人耳的．在15℃的空气中舞曲声的传播速度是　 ____　米/秒．为了不影响周围居民的生活和休息，跳舞时将音箱的音量调小，这是在 ____处减弱噪声．

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It was late last Monday, but Tom was still ____ TV in his room. There was a wonderful football match on TV. ____  excited he was! That night he  ____ go to bed until twelve o'clock. The next morning, it was a quarter to eight. It was ____ late for Tom to get to school ____ time. But he was still in bed. When Tom ____ school, it was eight. The teacher was already beginning her lesson. As soon as Tom came into the classroom, she got  ____ and said,"What time is it now, Tom "Tom felt sorry and could say  ____ . In English class, he  ____ a test. As he didn't know the lessons at  ____ , Tom failed his English test.

下面漫画体现了我国法律对未成年人的（    ）