1. By moving the radar beam around slowly in circles, we can _____ the surroundings.
A. explore B. expose
C. exploit D. addle
addle 混乱的、糊涂的
addle egg 变坏了的蛋
explore 开发、研究、探索
expose 暴露
exploit 开发、剥削
explode 爆炸
lodestar 北极星
the exploited 被剥削者
