A.CNKIB.Web of ScienceC.PubMedD.Derwent Innovations Index
A.電腦B.微機(jī)C.電子計(jì)算機(jī)D.個(gè)人電腦
A.紙件檢索B.光盤檢索C.軟件檢索D.網(wǎng)上檢索