49. Which of the following is NOT true?
(A) Drones can be dangerous.
(B) Drone users can be punished if they fail to register.
(C) There is not scrutiny to drone operators’ age in U.S.
(D) The Drone law sets rules for casual operators.
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統計: A(11), B(23), C(316), D(35), E(0) #1367644
統計: A(11), B(23), C(316), D(35), E(0) #1367644