-What colour are they?-They're ____.
如图所示,质量为55g的新鲜鸡蛋在水中下沉.陆续向水中加盐并轻轻搅拌鸡蛋,最后鸡蛋悬浮在水中.
求:
A地海拔﹣32米,B地海拔70米,两地海拔高度相差( )米.
She TV yesterday evening.