送、回风总管穿越通风空调机房的隔墙和楼板处应设( )。
A．排烟阀 B．调节阀C．防火阀 D．防火排烟阀
参考答案：C
老年性骨质疏松宜选用
A．黄体酮
B．泼尼松
C．甲睾酮
D．苯丙酸诺龙
E．炔诺酮
After graduation from college, I tried to stand on my own feet and no longer _______ my parents.
A．cared about
B．devoted to
C．heard about
D．turned to
