单项选择题
A.词汇发展B.有明显的逻辑能力C.句式掌握D.口语的表达能力
A.It’s pretty goodB.I feel so sorry about that.C.I’d like to have some tea.
A.来压显现分析B.来压步距的确定C.来压强度D.支架受力情况