通过选取一组合适的入口参数，设计了一种在平面上具有梯形入口的水下入口，并进行了验证。

By selecting a group of suitable entrance parameters, a submerged inlet with the trapezoid entrance on the plane surface is designed and verified.

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研究人员选取了60名成人，随机分为3组，每组20人。

Researchers took 60 adults and randomly split them into three groups of 20.

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如果用户重置密码成功，你需要用一组新的随机选取的问题来代替以前所使用的问题。

If the user is successful, you choose a new set of random questions to ask to replace the questions previously used.

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