問題詳情
38.How should you signal the crane operator to LOWER the boom？
(A)With arm extended and fingers closed, point thumb downward.
(B)With arm extended downwards and forefinger pointing down, move hand in smallhorizontal circles.
(C)Extend arm with the palm, and hold this position rigidly.
(D)With hands clasped in front of your body.
參考答案
答案：A
難度：簡單0.738636
統計：A(65),B(10),C(6),D(3),E(0)