判断对错.
个位上是3、6、9的数都是3的倍数.
根据课文古诗两首《敕勒歌》读一读，填一填
天似穹庐，____。
已知：如图，四边形ABCD中，∠A=∠C，AB∥CD．求证：AD∥BC．
— Do you often go swimming ____________ Sunday morning?
— Yes. Why not _____________ with me this Sunday?
