如图所示oo是半圆柱形玻璃的对称轴在纸面上的投影在圆内有两细束与oo平行且等距的单色光a和b从玻璃砖射出后相交于oo下方的p点 Template




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Try and sketch some of theseExecutioner, Welder, Basset hound, Radio, Fairy, Bongos, Goldfish, Flea, Ballroom dancer, Toast, view more ideas


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tomski如图所示oo是半圆柱形玻璃的对称轴在纸面上的投影在圆内有两细束与oo平行且等距的单色光a和b从玻璃砖射出后相交于oo下方的p点 coloring