每位客户只限参与是次网上问卷调查一次，而且必须填妥问卷内之每个项目。

Each customer can only participate in the online survey once and must complete each question included in the survey.

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所有的夫妇都被要求填写一份网上问卷调查，以帮助夫妇了解自己的长处和弱点。

All were asked to complete an online questionnaire normally used to help couples understand their strengths and weaknesses.

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同时本文采用网上问卷调查的方式对喇叭沟门自然保护区自然资源旅游吸引力及游客支付意愿进行调查统计分析。

The paper using the online survey on natural resources, tourist attraction and willingness to pay of LaPaGouMen nature reserves to investigate and statistical analysis.

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