【C10】A．opinionB．researchC．toolD．insight

【C11】A．experimentB．researchC．surveyD．questionnaire

【C6】A．testB．researchC．operationD．project

A．experimentB．researchC．operationD．survey

A．studyB．researchC．reportD．document

A．opinionB．ideaC．mindD．memory

__________ 查看材料A.summaryB.researchC.inspectionD.sur