【判断题】光滑接触面约束反力,作用于接触处,沿接触点法线方向,指向物体。()
【简答题】声临其境——诗歌朗诵技巧之语音.mp4 看了这个视频之后说说你认为语音在朗诵当中的地位有多重要?也可以录一段音频来表达语音在诗歌朗诵中的地位。
【单选题】下列描述正确的是()
A.
绳索的约束反力的作用线是沿绳索,方向是指向被约束体
B.
对光滑接触面约束,约束反力沿接触处的公法线,背离被约束体
C.
对固定铰支座约束,约束反力可以用互相垂直的两个分力表示
D.
对于构成中间铰链的两个构件,构件1与构件2可以组成一对平衡力
【单选题】The experienced teachers try their best _____ the younger ones _____experience.
【多选题】Which are the ways that help the younger teachers keeping improving in Shanghai?
A.
Make sure the younger teachers get a chance to watch master teachers' work
B.
They have weakly study group where teachers get together talk about what's working.
C.
They require each teacher to observer and get feedbacks to their colleagues.
D.
They ask students to give a mark to their teachers.
【简答题】基本数据类型boolean的封装类是( )。