单项选择题 On the face of it, the plan under consideration is -------. and indeed, has already sparked protests from several prominent politicians, who argue that "hasty implementation" could ------- the economy.（）

单项选择题 Although most people who acquire West Nile have no ------- and those who do normally suffer little more than flu-like illness, it is believed they still can carry ------- amounts of the virus in their blood for several days.（）

单项选择题 Future generations of physicists may look at the ------- of their former ideas and see in it, not the relics of some extinct creature, but a crude, early, yet wholly ------- version of their more modern theories.（）