井口两股轨道上不准同时放()趟车辆。
A、1
B、2
C、3
D、4
参考答案:B
--I like to sing_______music. --Really? But I like music that I can dance______.
A.along , with
B.along, to
C.with , with
D.along with, to
让患者训练舌根音如“g、k”等可加强软腭肌力。