A:魏源
B:姚莹
C:林则徐
D:徐继畲
Introduction of a Band
Band name
The new band is called ____.
Country
The band was set up in ____.
Members
There are four people in the band and they are all ____.
Kind of music
More and more people love to listen to their ____.
The reason why people like them
All of their music sounds comfortable and make people ____.
读图,回答下列问题。
在验证力的平行四边形定则实验中,如图(甲)、(乙)所示,某同学分别用弹簧秤将橡皮条的结点拉到同一位置O,记下(甲)图中弹簧秤的拉力:F1=2.0N、F2=2.6N;(乙)图中弹簧秤的拉力:F′=3.6N,力的方向分别用虚线OB、OC和OD表示.
对于做匀变速直线运动的物体( )