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

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

A．experimentB．researchC．operationD．survey

【C19】A．experimentB．testC．examinationD．inspection

A．studyB．researchC．reportD．document

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

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