Hi, everyone! My name is Wang Kai. I’m twelve. I’m in Class 5 Grade 7. Teachers’ Day is coming. I want to give some presents to my teachers.

   Miss Zhang is my English teacher. She is twentyfour years old. She likes flowers very much. I want to give her some flowers from my garden. My Chinese teacher has a fouryearold son, Li Xin. He likes playing football a lot. I want to give my Chinese teacher a “special” present: playing football with Li Xin for a day! What about my maths teacher Mr. Zheng? He likes drawing pictures. I would like to draw a picture of him and give it to him.

   My friends, what presents do you usually give to your teachers? Please tell me!

某校食堂设计的一份营养餐食谱：米饭、鸡汤、红烧肉、清蒸鲫鱼．从膳食平衡的角度分析，还需添加（　　）

从公元前8000年开始，到公元元年为止，全球人口从532万激增至1亿3千3百万，在8000年间增加至25倍。从公元元年到公元2000年，人口再激增至60亿，在2000年间增加至60倍。这两次人口大爆炸的主要推动因素都是（    ）