载物台上遮光器的作用是 A.调节光线的强弱b.使光线通过通光孔反射到镜筒内c.遮住光线不使其反射到镜筒内d.使光线均匀地进入视野内 题目和 Template




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tomski载物台上遮光器的作用是 a.调节光线的强弱b.使光线通过通光孔反射到镜筒内c.遮住光线不使其反射到镜筒内d.使光线均匀地进入视野内 题目和 coloring