阿摩線上測驗
32. What is the main idea of the passage?
(A) Drones can be used in different areas.
(B) The manufacture process of drones.
(C) Why police like to work with the drone experts.
(D) The promising technology implemented in the world.
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統計： A(0), B(0), C(0), D(1), E(0) #3351933
統計： A(0), B(0), C(0), D(1), E(0) #3351933
