常见的错误姿态()。
A、头部前突
B、脊柱侧弯
C、骨盆前倾
D、脊柱后凸
参考答案:A, B, C, D
Discourse theory of second language acquisition was developed from the______.
A.habit formation theory
B.Hallidays theory of first language acquisition
C.monitor theory
D.Cognitive theory
期货市场可以降低价格波动对行业发展的不利影响,有助于稳定国民经济()。