一 You shouldn't take photos inside the museum; it's against the rules.
一 Sorry. I will never do it again.
A:cameras
B:food
C:pictures
What you want?
——This history book is of great value.——Exactly. ____________ can be enjoyed from it ____________ you have a deep understanding of it, however.
以下说法中错误的是( )
在如图所示的算法流程图中,输出S的值为( )
小华同学在“探究滑动摩擦力与压力大小关系”的实验中,他把物体用垂直于竖直墙壁的力F压压紧在墙壁上,同时用竖直向上的力F匀速拉动物体向上运动,如图所示,保持其他条件不变的情况下,通过改变F压来改变物体与墙壁之间压力的大小。经过多次实验测量F压、F,记录了如下实验数据:
实验次数
1
2
3
4
5
F压/N
F/N
1.2
1.4
1.6
1.8