如图所示水下光源s�水面a点�射一束光线折射光线分别为ab两束.则 A.在水中a光的速度与b光的一样大b.ab两束光相比较在真空 Template




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tomski如图所示水下光源s�水面a点�射一束光线折射光线分别为ab两束.则 a.在水中a光的速度与b光的一样大b.ab两束光相比较在真空 coloring