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八年级物理上册2.3《我们怎样区分声音（续）》预习检测（新版）粤教沪版.doc

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1我们怎样区分声音（续）预习检测一、选择题1、开大收音机的音量旋钮是为了（ ）A、增大声音的响度B、提高声音的音调C、改善声音的音色D、减小噪音2、声音在传播过程中（ ）A、音调会逐渐降低 B、响度会逐渐减小C、音色会逐渐改变 D、音调、响度、音色都会改变3、体育课上老师发出的口令，在操场近处的学生听到了，而远处的学生没有听清楚，其原因是（ ）A、远处学生听到的声音响度小 B、老师发出的声音音色不好C、老师发出的声音频率低 D、远处学生听到的声音振动幅度大2参考答案一、选择题1、A2、B3、A

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