第一个获准用于治疗AIDS感染的药物是（）
A、更昔洛韦
B、伐昔洛韦
C、齐多夫定
D、阿糖腺苷
E、金刚烷胺
参考答案：C
简述制约社区发展的要素。
Many people who saw the film were afraid to swim in the sea when they remembered the scenes
people were eaten by the shark.
A. when
B. on which
C. at which
D. where
