199 A motorcycle operator should develop the habit of defensive driving. Pay attention to the traffic condition at all times and check the side mirrors every 5 seconds for the traffic condition behind to ensure safety. Avoid focusing on one target for over 2 seconds and neglecting the surrounding traffic.
(A)O
(B)X

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統計： A(1), B(0), C(0), D(0), E(0) #2209146