517 The steps to follow when pressing the red emergency button on the pole by the level crossing are
(A) 1. push; 2. press; 3. run
(B) 1. run; 2. push; 3. press
(C) 1. press; 2. push; 3. run.

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統計: A(1), B(0), C(1), D(0), E(0) #2216154