阿摩線上測驗
44 Oil penetrates into the structure of the plumage of birds and the fur of mammals, reducing its insulating ability, and
making them more vulnerable to temperature fluctuations and much less ________ in the water.
(A) buoy
(B) buoyage
(C) buoyancy
(D) buoyant
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統計： A(8), B(61), C(39), D(90), E(0) #1200250
統計： A(8), B(61), C(39), D(90), E(0) #1200250
