Fair and（1）competition in government procurement around the world is good business and good public policy. Competitive pricing, product （2）and performance improvements result from competitive practices and help ensure that government authorities get the best （3）for the public they serve.

1.见题干（）

A. open

B. continue

C. dependent

D. reliable

水蒸汽的形成经过五种状态的变化：即（）水、（）水、（）蒸汽、（）蒸汽、（）蒸汽。