the lenses in an optical microscope bend the light passing through a specimen to form an image of taht specimen that is much lager ----------actually viewed a than it b than the one c one than d than on which 不知道选择哪个？？？帮帮忙。。。谢谢各位了。。 主要是分不清楚the one , it 的混用？？
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发表于 2004-3-22 03:32:00
