questionnaire and investigation

• 问卷调查

questionnaire and investigation的用法和样例：

例句

1. There was little feedback from our questionnaire.
   我们问卷调查的反馈信息极少。
2. Expert discussion and questionnaire investigation are the major methods used in this research project.
   专家座谈与问卷调查是本研究主要使用的两种工具。