22) Which hard part of certain planktonic particle can affect the alkalinity of seawater?
(A) diatom
(B) cyanobacteria
(C) dinoflagellate
(D) coccolithophorid
(E) ciliate

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統計： A(0), B(0), C(1), D(1), E(0) #2788470

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Which hard part of ...
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