为减轻股骨干骨转移瘤合并病理性骨折时的症状，应采用（）
A.患肢抬高
B.髓内针固定
C.夹板固定
D.石膏外固定
E.皮牵引
参考答案：B
— Have you heard me?
— I’m sorry, I you to me.
A．don’t know, are speaking
B．didn’t know, were speaking
C．don’t know, were speaking
D．didn’t know, are speaking
对污水中可沉无机悬浮物质，常采用（）来去除。
A、格栅
B、沉砂池
C、调节池
D、二沉池
