Which of the following aspects is not what an economic union concerns？（） common currency。 harmonized tax rates。 harmonized tax rate structures。 common political policy。
The suggestion that the CEO（）the prizes is welcomed by all. would present。 present。 presents。 ought to present。
The words of the buyer left a（）impression on his mind. long。 lively。 lasting。 liberal。
常温下，原子大部分都处在激发态。
常温下大部分的原子是处于基态的，很少原子处于激发态或者亚稳态。
Competition，we believe，（）the character of a firm rather than corrupt it.
