如图13所示的军事观察孔图中的虚线表示空气孔的观察范围现在在孔中嵌入玻璃砖后观察的范围将 A变大 B变小 C不变 D无法确定 Template




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tomski如图13所示的军事观察孔图中的虚线表示空气孔的观察范围现在在孔中嵌入玻璃砖后观察的范围将 a变大 b变小 coloring