机体酸碱平衡调节包括()
A.肺
B.血液缓冲系统
C.肾
D.心脏
E.脾
参考答案:A, B, C
根据句子的意思,完成下列单词。
1. When do you play sp_ _ts?
2. I like spring best. I can fly k_ _ _s.
3. It's Sunday. Everybody is busy. My mom is c_ _k_ _ g dinner, My dad is answering the ph_ _ _. My
brother is drawing p_ _ tures. My sister is _ _ _ _ _ ing TV. I am doing the di_ _es.
4. What is the rabbit doing? It's j _ _ _ ing.
试用委托代理理论和契约理论来解释企业与债权人之间的财务关系及其博弈过程。