【单选题】Which of the following is NOT stated as one of the purposes of free public libraries?
A.
To provide readers with comfortable reading rooms.
B.
To provide s with opportunities of further education.
C.
To serve the community's cultural and recreational needs.
D.
To supply technical literature on specialized subjects.
【单选题】One of the purposes of using official languages such as Swahili is to help local communities reclaim their unique identities.
【多选题】对于一个实际的物理系统,其动态方程建模主要考虑哪些原则?( )
【多选题】对于一个实际物理系统,其动态方程建模主要考虑以下哪些原则?
【多选题】如图24—7所示,三个线框是用同一种金属材料制成的边长相同的正方形, a 线框不闭合, b 和 c 都闭合, b 线框的导线比 c 粗。将它们在竖直平面内从相同高度由静止释放,图中水平虚线的下方是方向垂直于线框所在面的匀强磁场。下列关于三个线框落地时间的说法中正确的是( )
【判断题】One of the purposes of e-government is to reform the work processes within and among governmental institutions.
【多选题】对于一个实际物理系统,其动态方程建模主要考虑以下哪些原则?