Physics Unit23: Light and Geometric Optics (id: 73a2af886)

本题目来源于试卷: Physics Unit23: Light and Geometric Optics，类别为 通用国际物理

[单选题]
Light travels fastes0;xs6h9.kdt p 5 t(mo, 5nghwg)mcvitt90 gyuihwz9na z2og*ay5 j/gm1 nt)4 k

A. in a vacuum.
B. through water.
C. through glass.
D. through diamond.


参考答案:  A


本题详细解析: 暂无

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