阿摩線上測驗
50. According to this article, what is the function of penguins’ feathers?
(A) They can release bubbles underwater.
(B) They can allow oxygen to be restored.
(C) They can decrease swimming speeds.
(D) They can help find their mates
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統計： A(222), B(89), C(53), D(18), E(0) #3077097
統計： A(222), B(89), C(53), D(18), E(0) #3077097
