世界格局多极化趋势的根源是[ ]
A．苏联解体、东欧剧变
B．世界经济格局的多极化
C．区域性经济集团的出现
D．美国经济的相对削弱
答案：B
I would like Tom to go with us, but Tom insisted at home.
A．that he stay
B．that he says
C．staying
D．to stay
水体
变
变