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.（）

单项选择题 The purpose of interior design is to create a physical environment that is ------- yet connected to the outside world, an environment that is ideal for the pursuit of relaxation in a zone of partial -------.（）