1.（2022年新高考1卷）Giant pandas also serve ___64___ an umbrella species(物种), bringing protection to a host of plants and animals in the southwestern and northwestern parts of China.
答案： as
解析：考查介词。句意：大熊猫还扮演着保护伞的角色，为中国西南和西北地区的许多动植物带来保护。固定短语：serve as (充当)。故填as。
