为了研究合力和分力的大小,甲乙两个同学做了如下实验,甲同学用拇指把栓校园卫士牌的轻质细绳用两手拉直,乙同学用一个手指轻轻一推,如图所示.关于这个实验,以下说法错误的是( )
A:甲同学对细绳的拉力的合力与乙同学对细绳的推力大小相等
B:根据力的合成与分解原理可知,乙同学只要轻轻用力沿着同绳垂直的方向推细绳,细绳就会发生弯曲
C:根据功能原理可知,乙同学要想推动细绳,必须用较大的力对细绳做功,甲同学的手才能彼此靠近使细绳弯曲
D:根据实践经验可知,合力可以小于分力
How many kinds of music do you know ? There is classical music, 1 music, country music, rap (说唱音乐) and so on. I think every type of music has its own 2. For example, I think country music is so beautiful and rap is very cool. My favorite kind of music is pop music 3 it is very interesting and exciting. It can make me feel very 4 . Now I want to tell you5 about my favorite singer and music group. My favorite singer is Jolin. Her Chinese name is Cai Yilin. She has a very beautiful 6 and her songs very wonderful. I love her song Say Love You, The Smell of Lemon Grass and Pirates best. What do you 7 these songs ? I hope Jolin has a good time every day. 8 my favorite music group ? That is S.H.E. Their songs are so cool that I have never 9 a chance to watch their performances.10 to music is also good for me. It can make me feel relaxed and less lonely when I stay at home alone.