The Flower Show _______is in Makou of Zhangpu welcomes the visitors from both China and abroad.
A:that
B:where
C:who
____
汹涌
堤岸
崩溃
驯服
绚丽
竖琴
催促
波纹
观察下列式子.
①32﹣12=(3+1)(3﹣1)=8;
②52﹣32=(5+3)(5﹣3)=16;
③72﹣52=(7+5)(7﹣5)=24;
④92﹣72=(9+7)(9﹣7)=32.