停用乙醚后麻醉作用消失的原因是（）

A.药物分布到其他组织中

B.药物在体内代谢

C.药物以原形经肺排泄

D.药物从肾脏排泄

E.产生急性耐受性

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

空白（3）处填（）

A.help

B.server

C.value

D.policy