在没有关节的地方出现了类似关节的活动，称（）.
参考答案：假关节活动
After living there for one year, they have _________there.
A．accustomed to working
B．accustomed to work
C．been accustomed to working
D．been accustomed to work
人体内红细胞形成氧合血红蛋白的场所是
A．肺动脉
B．组织细胞间的毛细血管
C．肺静脉
D．肺泡处的毛细血管
