功能不良综合症的治疗原则:
参考答案:
姿势矫正;有效牵伸的原则;安全牵伸的原则。
It is necessary _____ others when they are in trouble.[ ]
A. of us to help
B. of us helping
C. for us to help
D. for us helping
胶带断开原因是胶带拉力过大,接头质量不合格。()