131 Which of the following is correct regarding the use of horns?
(A) Each tap on the horn may not be longer than 2 seconds.
(B) Each tap on the horn may not be longer than 1 second.
(C) Each tap on the horn may not be longer than half a second.

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統計： A(0), B(0), C(3), D(0), E(0) #2214592