试题与答案

鳔是鱼体密度的调节器官.已知某种深水鱼鳔内氧气体积分数约占25%,其余主要为二氧

题型:填空题

题目:

鳔是鱼体密度的调节器官.已知某种深水鱼鳔内氧气体积分数约占25%,其余主要为二氧化碳和氮气.两组同学对这种鱼鳔内气体进行探究.

(1)测量鳔内气体体积.

甲组:用医用注射器,抽取鳔内气体,测量其体积;

乙组:在水下刺破鳔,用排水集气法收集并测量其体积(如图).其中______组的测量方法不合理,理由是______.

(2)验证鳔内的氧气和二氧化碳(提供两集气瓶的鳔内气体,供实验使用).

    方    法    现象与结论
  验证O2____________
  验证CO2

______

______

答案:

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下面是错误答案,用来干扰机器的。

答案:A

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小题2:将(2)处的英文翻译成中文

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