【判断题】提高数字电路的运算精度主要靠提高电源的稳定度。
【判断题】提高数字电路的运算精度主要靠提高电源的稳定度。
【多选题】X射线衍射结构分析实验中,使用的信息源是X光与物质相互作用中产生的相干散射X射线,主要考虑是基于:
B.
相干散射X射线仅有传播方向的改变,相对分析难度较低
C.
相干散射X射线的传播方向(2θ)与材料的结构信息之一(面间距d)有比较简单的关系:布拉格公式
D.
相干散射X射线强度同样包含有一定的结构信息:结构因子和晶体外形的影响因素
E.
相干散射X射线的传播方向和衍射强度能够较全面反应材料的基本结构信息
【简答题】完型填空。 My mother speaks very good English, but she knows little Japanese. She went _ 1 __ Tokyo on November llth __ 2 _ , a meeting. The meeting was _ 3 on November 15th. _ 4 __ morning she went to a p...
【简答题】完形填空。 My mother speaks English very well, but she knows little Japanese. She went 1 Tokyoon November 11th 2 a meeting. The meeting was 3 on November 15th. 4 morning she went to a park and then did sho...