- What do you think of the woman singer?
- Her voice sounds _______. I like her songs.
A:sweet
B:sweetly
C:bad
D:badly
13-9=( )
在做“验证动量守恒定律”的实验中,小球的落点情况如图所示,入射球A与被碰球B的质量之比为MA:MB=3:2,则实验中碰撞结束时刻两球动量大小PA:PB的值为____.
宋时,以“修身齐家治国平天下”相标榜的士大夫,不顾传统道德的指责,“不耻事贾,牟取暴利”。这表明( )