46. The word plankton in this passage means “_____.”
(A) a type of bird
(B) a type of whale
(C) a very small sea anima
(D) a piece of board or wood

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統計: A(0), B(2), C(1), D(0), E(0) #1406474

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浮游生物(Plankton)泛指生活於水...
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