养鸡场的母鸡下蛋不能孵出小鸡,根本原因是鸡蛋贮存的养料太少 

养鸡场的母鸡下蛋不能孵出小鸡,根本原因是鸡蛋贮存的养料太少         (   )

答案

×解析:

相关题目

In China, shaking hands with each other is a common________ when people meet for
In China, shaking hands with each other is a common________ when people meet for the first time.      A.sense              B.practice             C.scene        
The seat belt in the car sometimes can          you from traffic accide
The seat belt in the car sometimes can          you from traffic accidents. A. protect         B. preventC. pretend         D. endanger
The Marquis was thought _________ some terrible wrongs to his tenants.    A. o
The Marquis was thought _________ some terrible wrongs to his tenants.    A. of doing B. that he had done      C. to have done   D. to have been done  
唐代五代,中央集权大为削弱,扭转这一局面,宋初采取的
唐代五代,中央集权大为削弱,扭转这一局面,宋初采取的重要措施之一是 A.文官任知州  B.设三司使  C.设枢密院 D.施行将兵法
读下面两区域田,回答下面试题。 图中甲、乙两地发展种植
读下面两区域田,回答下面试题。 图中甲、乙两地发展种植业的主要制约因素分别是       (    ) A.土壤、水源       B.光热、降水  C.
下图所示为人工培养的肝细胞中 DNA 含量随时间的变化曲线,
下图所示为人工培养的肝细胞中 DNA 含量随时间的变化曲线,据图判断正确的是                                                
阅读下面的文字,完成6-9题。蔡元培比冯友兰“老实”? 
阅读下面的文字,完成6-9题。蔡元培比冯友兰“老实”?                                          ――读《欧洲大学史》在西方
如图所示,用两个完全相同的滑轮,匀速提升质量相等的物
如图所示,用两个完全相同的滑轮,匀速提升质量相等的物体。且物体质量大于滑轮质量,不计绳重和摩擦。比较甲、乙两种方式可知_________更省力,__

最新题目