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

Competitive pricing,product （） and performance improvements result from competitive practices.

A.recession

B.innovation

C.crisis

D.ability

嵌入式SQL语句与主语言之间的通信方法是：主语言向SQL语句输入数据主要用主变量(主语言中的程序变量)来实现；SQL语句向主语言输出数据主要用主变量和游标来实现。所谓游标，指的是系统为用户开设的一个 【16】 。