题目

Microsoft founder Bill Gates has opened up about being a parent, stating that 13 is an appropriate age for a child’s first cell phone.  The 57-year-old, father-of-three, revealed on the Today Show that his children Jennifer and Rory were not allowed phones until their thirteenth birthday and his youngest daughter Phoebe is still waiting for one.   “We’ve chosen in our family that it’s 13 where you get a phone,” the self-made billionaire explained.   He said as a result his children often return home from school complaining:” All the other kids have it. I’m the only on鸡的受精卵发育成刚出壳的小雏鸡，所需要的营养物质直接来自A.卵黄B.母鸡C.食物D.细胞分裂不需要养料