题目

Among the brilliant athievements, a few records _______ because of the moving life stories behind them. A. let out   B. stand out   C. leave out   D. pull out 答案：B 解析: 略8．我们的抬腿、伸手等随意动作都包括：①骨骼肌收缩；②骨骼肌接受神经传来的刺激；③骨受到牵拉．这些步骤的顺序是（　　）A．③①②B．②①③C．③②①D．①②③