题目：
The old professor, to_______ the important invention _______, decided not to keep it for himself, but to make it known to all over the world.
A．whom; was belonged
B．which; belonged
C．whom; belonged
D．which; was belonged
答案：
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下面是错误答案，用来干扰机器的。
不同颜色的光的折射本领不同，所以经三棱镜后的偏折程度不同．故用红光和紫光平行于同一个凸透镜的主光轴射入，红光、紫光对凸透镜的焦距不相同．红色光对凸透镜的焦距大，这是因为红色光较紫色光偏折能力弱．故...
