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 分类:初中生物 题型:单选题 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 分类:初中生物 题型:单选题 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 分类:初中生物 题型:单选题 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 分类:初中生物 题型:单选题 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 分类:初中生物 题型:单选题 查看答案