在新的世界格局中，起决定作用的是[ ]
A．军事实力
B．经济实力
C．科技实力
D．教育水平
答案：B
Nearly 56 percent of Chinese believe that traffic order got even worse after tightened traffic regulations ______at the beginning of 2013.
A．have been adopted
B．were adopted
C．adopted
D．had adopted
B．一切运动的物体都具有动能
C．运动的物体不一定具有动能
D．以上说法均为错误
