31. Oil clearance means oil _______ from the surface of the water.
(A) resistant
(B) contamination
(C) skimming
(D) mixture
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統計: A(83), B(113), C(345), D(97), E(0) #3155837
統計: A(83), B(113), C(345), D(97), E(0) #3155837
詳解 (共 2 筆)
#6025265
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