My name is Chen Lan. My home is in Gulangyu. Do you know it? It is in Xiamen. It is near the sea(海). Gulangyu is a small place，but it is very nice and clean. There are no cars，no buses. People only walk. So it is very quiet.
   Our house is in the middle of Gulangyu. Behind our house there is a big old tree. My grandfather tells me that the tree is very，very old. There are many birds in the tree. We call it a “bird tree”. Our house is near the sea. The sea is big and blue. There are a lot of fish in the sea. After school，I go there and catch(捉) fish with my friends. It is very interesting. I like fish and I like catching fish.

①体现按劳分配原则，保障科研人员和教师有稳定的收益分配

②健全按生产要素分配机制，调动教科研人员的积极性

③在初次分配中更加注重效率，再分配中更加注重公平

④构建体现增加知识价值的收入分配机制，促进科技成果加快转化为现实生产力

人一生中身体发育和智力发展的黄金时期是青春期，进入这一时期后，男孩出现____，女孩出现____，标志着人具有了生殖能力．

下列食品中，不需要借助发酵技术的是（  ）