进人落地式配电箱的电线管，管口高于基础面不应小于（）mm。
A.50
B.60
C.70
D.80
参考答案：D
伤口处有鲜红血液涌出时怎样处理？
She ____________ the piano every day. [ ]
A. playing
B. plays
C. play
D. played
