中国古代有很多重大发明,下列发明按出现的先后顺序排列正确的是( )
①造纸术 ②火药 ③司南 ④活字印刷术
A:①②③④
B:③②④①
C:②①③④
D:③①②④
— Archimedes was really a wise man. He could easily ________ the king's problem.
— Yes, so he was. And he was also a great scientist who had a lot of ________.