机体调节酸碱平衡的机制不包括

A．血液中的缓冲体系

B．细胞内外的离子交换

C．肺的呼吸作用

D．肾脏的排酸保碱功能

E．肝脏的生物转化

The president of the country was well ___ of when he was in power.[      ]

A. praised

B. fond

C. appreciated

D. thought