A:Oh,I’d choose a better one for you next time.
B:You’ve had a gift for music,haven’t you?
C:I’m glad that you like it so much.
D:Sorry,but don’t blame me,dear.
猜一猜,用拼音写出谜底。
wān wān yí zuò qiáo,jià zài bàn tiān yāo ,qī sè pái de qiǎo ,yí huì bú jiàn liǎo.
zhè shì ____。
A.受到方向向右的摩擦力
B.受到方向向左的摩擦力
C.不受力