单项选择题
若在每105个硅原子中掺杂一个施主原子,试计算在时自由电子和空穴热平衡浓度值。其中,硅原子密度为4.96×1022cm-3。( )
问答题 Technical products should not only fulfil the required [填空1] function as defined by the function structure but also be [填空2] pleasing to their users.
判断题 会昌五年,唐武宗连续颁布敕令,禁止摩尼教在华传播,关闭了回鹘保护下建立的摩尼教寺院。正确错误
问答题 (123.4)8=([填空(1)] )2