【简答题】The clock struck eleven at night. The whole house was quiet. Everyone was in bed except me. Under the strong light, I looked sadly before a huge pile of troublesome stuff they call “books”. I was goin...
【单选题】依据第 18 题的资料,如果该企业采用后进先出法,发出材料的成本为( )元。
【简答题】The clock struck eleven at night. The whole house was quiet. Everyone was in bed except me. Under the strong light, I looked sadly before me at a huge pile of that troublesome stuff they call “books”....
【判断题】邀请招标应作为政府采购的主要采购方式。( )
【简答题】点肩上托手:经平抬手点肩,同时(),双推手同时()
【判断题】因为P型半导体的多子是空穴,所有它带正电。
【简答题】一理想费米气体的粒子数为N,体积为V,能量为E,粒子的态矢量为 ,式中,l和k是轨道量子数,自旋量子数s可取 和 两个值.设粒子的能级 ,只依赖量子数l,简并度为 .假设每一个量子态上最多只能有一个粒子,并且轨道量子数,和是相同的两个量子态 和 不能同时被占据.如果气体处在热力学平衡态,试导出占据在能级 上的粒子数a l 的表达式.
【判断题】西方人庆祝胜利常用的“V”形手势,应注意把手心对着观众。