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阅读理解Maybe ten-year-old Elizabeth put it best whenshe said to her father, But,Dad, you can't be healthy if you're dead.Dad, in a hurry to get home before dark so hecould go for a run, had forgotten to wear his safety belt—a mistake 75% of USpopulation make every day. The big question is why. There have been many myths about safety beltever since their first appearance in cars some forty years ago. The followingare three of the most common. Myth the Number One: It's best to be thrownclear of aserious accident. Truth: Sorry, but any accident serious enoughto throwyou clear isable going 音色由物体本身的材料材料、结构结构决定．同样是弦乐器的小提琴和二胡能能（填“能”或“不能”）发出同样的音阶，但不能不能（填“能”或“不能”）发出同样的音色．现代电子琴可以模仿不同的乐器发声，其实主要是在模仿不同乐器的音色音色．