Teratomas are unusual forms of cancer in that they are composed of tissues such as tooth and bone,tissues not normally found in the organ in which the tumor appears.请NN帮忙指点tissues not normally found in the organ 是个什么结构,我觉得不完整,该有个are才对啊.那么整句该怎么划分结构.多谢
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发表于 2004-4-11 16:56:00
