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https://online2.tingclass.net/lesson/shi0529/0009/9872/369.mp3

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请把调查表交还给研究人员。

Please return your survey form to the researchers.

请把调查表交还给研究人员。

All right.

好的。

How many people have actually been investigated?

有多少人接受了调查?

How many people have actually been investigated?

有多少人接受了调查?

1200 users were chosen randomly.

随机选出的1200个使用者接受了调查。