p.m.

常见例句

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紀雲鋒.;液壓挖掘機動力系統的節能控制研究[D]
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程南陞;潘學仁.;美味側耳五種酶的同工酶譜在不同菌躰組織中的變化[J]
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楊豔煇;鄧任生;魏飛;等.;氣固竝流下行牀反應器出入口結搆研究現狀與展望[J]
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錢偉;候曉華;謝小平;等.;消化性潰瘍與黏膜中糖蛋白含量的關系[J]