2. 首页 > 题库四 >
  2. 问题

圆口纲鱼类的牙齿为角质齿，软骨鱼类和硬骨鱼类的牙齿是真正的钙化齿。

7 查阅

圆口纲鱼类的牙齿为角质齿，软骨鱼类和硬骨鱼类的牙齿是真正的钙化齿。

A.正确

B.错误

参考答案:

答案：正确

相关问题:
  • 大部分硬骨鱼类在肠开始处有许多指状盲囊突出物，称螺旋瓣。
  • 所有鱼类均无胃腺。
  • 一般口裂比较大的鱼类都属于肉食性。
  • 鱼类一般没有舌
  • 鱼类的食道上有味蕾和发达的环肌，所以有选择食物的作用。
  • 螺旋瓣是软骨鱼类特有的结构，硬骨鱼类都没有。
  • 鲤科鱼类都没有胃，也没有幽门垂。
  • 大多数鱼类的呼吸器官是（）。
    • 随便看看:
  • 健康养生
  • 亲子
  • 胎教
  • 孕妇健康
  • 中药百科
  • 心理

    • Ta老师-周边问题

    1.
    GE, News Corporation, Disney, Viacom,
    2.
    All British daily papers have Sunday e
    3.
    Which of the following movies is produ
    4.
    In Britain, many local dailies appear
    5.
    Which of the following tourist sites i
    6.
    Which of the following news agencies d
    7.
    Which of the following awards belongs
    8.
    Which of the following Big Three radio
    9.
    Which of the following magazines is no
    10.
    Which of the following newspapers has
    11.
    Which of the following four statements
    12.
    Which of the following statements abou
    13.
    Twitter enables users to send and read
    14.
    Instagram, Pintestest, Vine, Tumblr an
    15.
    Google+ is a web search engine.
    16.
    Who was the founder of Facebook?
    17.
    TCL Chinese Theatre is one of the land
    18.
    Hollywood, the birth place of American
    19.
    Which of the following statements is n
    20.
    American media have been consolidated
    版权所有,保留一切权利！© 2018-2023 Ta老师 Talaoshi.com 湘ICP备18019507号-1 联系QQ:469958。