—I love the internet. I've come to know many friends on the net.
—________. Few of them would become our real friends.
A:That's for sure.
B:It's not the case.
C:I couldn't agree more.
D:I'm pleased to know that.
20世纪推动经济全球化以前所未有的速度和规模向前发展的因素有( )①新航路的开辟 ②科学技术的发展③新型交通工具和通信方式的出现 ④两极格局的结束