(A) 2 (X)
(B) 3 ()
(C) 5 (X)
(D) no limit (X)
Answers: The number of steps in a flight generally should not be less than 3.
(A) 2 (X)
(B) 3 ()
(C) 5 (X)
(D) no limit (X)
Answers: The number of steps in a flight generally should not be less than 3.
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