欧洲专利数据库中,下列检索结果最少的检索式是:
A、title:”bisphenol A” and prepare
B、title or abstract:"bisphenol A" and prepar*
C、title or abstract:“bisphenol A” and prepare
D、title:“bisphenol A” and prepar*
A、title:”bisphenol A” and prepare
B、title or abstract:"bisphenol A" and prepar*
C、title or abstract:“bisphenol A” and prepare
D、title:“bisphenol A” and prepar*
A.名称:转基因 and 食品
B.摘要:转基因 and 食品
C.名称:(转基因 or 基因工程)and 食品
D.摘要:(转基因 or 基因工程)and (食品 or 玉米 or 大豆)
A、title: transgen and food
B、title or abstract: transgene and food
C、title or abstract:transgen* and food*
D、title or abstract: transgen* and (food* or corn or soybean)
A、在字段title中检索,RFID and logistics and system*
B、在字段title中,RFID and "logistics system*"
C、在字段title or abstract中,rfid and "logistics system*"
D、在字段title or abstract中,rfid and logitics and system*
A、key word(s) in title: catalyst and "polyvinyl chloride"
B、key word(s) in title or abstract: catalyst and "polyvinyl chloride"
C、key word(s) in title: catalyst and ("polyvinyl chloride" or PVC)
D、key word(s) in title or abstract: catalyst and ("polyvinyl chloride" or PVC)
A.“informationretrieval”/TI
B.“informationretrieval”
C.informationretrieval
D.informationretrieval/TI
A.aorbandc
B.aandborc
C.aorborc
D.aandbandc
(A)a and b and c
(B)a and b or c
(C)a or b or c
(D)a or b and c
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