题型:问答题 简答题 —Did he say anything that appealed ________ you especially?—Not really. Actually I slept halfway through his speech. 查看答案
题型:问答题 简答题 质量为1kg的小球,在空中沿竖直方向加速下落,加速度大小为8m/s2,先后通过空中相距0.75m的A点和B点,若小球在B点的动能是8J,求(1)小球在通过AB的过程中动能增加量;(2)小球在通过A点的速度大小。 查看答案