对“澶渊之盟”的认识有误的是( )
A:是北宋与西夏之间签订的和平协议
B:这个条约既反映了北宋统治者的软弱无能,但又在客观上促进了边境的相对稳定
C:它促进了民族的交往融合,体现了中华民族关系的发展
D:它的签订有利于人民的生产生活,有利于社会的发展
顾炎武在《日知录》中说:“人君之于天下,不能以独治也。独治之则刑繁矣,众治之而刑措也。”这实质上是主张( )
Our School Sports Day last week was a success! Here are the results.
Event
Class 1
Class 2
Class 3
Class 4
Long jump
No. 2
No. 1
No. 3
High jump
400 m
100 m
No.2
The students below broke school records.
New School Records
The longest jumper
Liao Ming
The highest jumper
Wu Qixin
The fastest runner (400m)
Gao Jiaming
The fastest runner (100m)
Zhao Yanfang
为研究某种材料的荧光特性,兴趣小组的同学设计了图示装置;让质子经过MN两金属板之间的电场加速后,进入有界匀强磁场.磁场的宽度L=0.25m.磁感应强度大小B=0.01T.以出射小孔O为原点,水平向右建立x轴,在0.4≤x≤0.6区域的荧光屏上涂有荧光材枓,(已知质子的质量m=1.6×10﹣27 kg,电量q=1.6×10﹣19 C,进入电场时的初速度可略)