单选题:图2是农田生态系统物质循环和能量流动示意图,数字代表能量,下列错误的是(  )。

  • 题目分类:初中生物
  • 题目类型:单选题
  • 号外号外:注册会员即送体验阅读点!
题目内容:
图2是农田生态系统物质循环和能量流动示意图,数字代表能量,下列错误的是(  )。
A.图中A→B→C代表食物链
B.B→C能量传递效率10%
C.先进行能量流动后进行物质循环
D.生产者固定的能量大于900

参考答案:
答案解析:

关于动物细胞及组织培养的说法错误的是(  )。

关于动物细胞及组织培养的说法错误的是(  )。 A.由于细胞培养中,细胞之间并非彼此独立而是在生命活动中相互依存,所以在某种程度上也像体内一样呈现一定的组织特

查看答案

Which of the following shows the proper pronunciation of th

Which of the following shows the proper pronunciation of the segment "ten bike

查看答案

Why aren't all bottles now made of polyester?

Why aren't all bottles now made of polyester?A.The price of oil and plastic ha

查看答案

Which of the following questions can be used in the questio

Which of the following questions can be used in the questionnaire for assessing

查看答案

请阅读短文,完成第题。 Several decades ago, the US sociologists went s

请阅读短文,完成第题。 Several decades ago, the US sociologists went so far as to develop

查看答案