反义词对对碰。
廉——( ) 勤——( ) 劣——( )
训——( ) 清——( ) 善——( )
廉一贪；勤—懒；劣一优； 罚一奖；清一浊；善一恶
Each member country of WTO must ________ its laws and regulations and compete on the principle of fairness and cooperation.
A．submit to
B．cater to
C．correspond to
D．relate to
隋朝开凿大运河的重大意义在于[ ]
A．满足隋炀帝游江都的愿望
B．南水北调
C．大大加强了南北经济的交流
D．便利对少数民族的战争
