填上合适的单位

如图为人体内部分生理过程示意图，其中A、B、C代表三种不同的物质，①、②表示两个生理过程，请回答：

（1）消化道中进行①和②的主要器官是____ 

（2）在观察活体材料时，发现某血管只允许甲细胞单行通过，那么，该血管应该是____ 

（3）在肺泡内发生气体交换后，肺泡外毛细血管血液颜色发生的变化是____，物质B是____，进入乙细胞后的作用是____ 

（4）A是____ ，除此以外，人体新陈代谢还产生许多其他废物，它们随血液流经肾单位时，经过肾小球和肾小囊壁的____ 作用和肾小管的____ 作用形成尿液，排出体外．

（5）如果C为葡萄糖，某人空腹时的血糖浓度经常高于正常范围，最可能的原因是他体内的____ 分泌不足．

A．甲状腺激素   B．性激素  C．生长激素  D．胰岛素

（6）人体各项生命活动能够统一协调进行，有赖于____ 系统和激素的调节作用．

    Food is very important. Everyone needs to 1 well if he or she wants to have a strong body. Our minds also need a kind of food.

    This kind of food is 2.We begin to get knowledge even when we are very young. Small children are 3 in everything around them.They learn 4 while they are watching and listening.When they are getting older，they begin to 5 story books，science books...，anything they like.When they find something new，they love to ask questions and 6 to find out the answers.

    What is the best 7 to get knowledge?If we learn 8 ourselves，we will get the most knowledge.If we are 9 getting answers from others and do not ask why，we will never learn well.When we study in the right way，we will learn more and understand 10.