单项选择题
Artists in the period of Renaissance had the advantage of being able to study Roman and Greek literature and sculpture because ______.
单项选择题 It may be inferred from the passage that ______.
单项选择题 The passage uses the term "vegetative forms" to refer to ______.
单项选择题 According to the passage, the risk of infection from airborne microorganisms would likely be greater during a ______.
