— Have you seen the film _____ Lost In Thailand (泰囧)?— Yes. It's great fun. I couldn't stop _____while I was watching it.
A:call; to laugh
B:calling; laughing
C:called; laughing
D:name; laughed
在对n个数据进行整理的频率分布表中,各组的频数与频率之和分别等于( )
如图所示,是演示动能和势能转化的实验装置。小球从轨道上的A点滚落下来,在圆形轨道上运动了一周,最后经过D点被抛出去,在整个过程中,小球的动能最大的位置是()
一只10Ω的电阻与一只0.1Ω的电阻并联,并联后的总电阻( )