40. What can be inferred about scientists’ attitude toward the drones in the sixth paragraph?
(A) They concern the balance of weight putting on the drones.
(B) They suggest that drones are the safest way of flying in the future.
(C) Flying monkey is still the best flying robot among the others.
(D) Drones will never collide with one another.
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統計: A(276), B(30), C(10), D(76), E(0) #1814851
統計: A(276), B(30), C(10), D(76), E(0) #1814851