计算:
1.5°=____ ′=____ ″;
450″=____ ′=____ °;
90°﹣54°48′6″=____ .
由小华表姐的经历看法律对社会公正的作用,你能得出什么结论?
I think watching table tennis match is ____ (simple) a waste of time. Why not take a walk in the garden, dear?
①哥伦布 ②迪亚士 ③达·伽马 ④麦哲伦