20. What is the most important role of photosynthetic organisms in an ecosystem?
(A) converting inorganic compounds into organic compounds
(B) absorbing solar radiation dissipating heat
(C) producing organic detritus for decomposers
(D)dissipating heat 
(E) recycling energy from other tropic levels

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統計： A(1), B(0), C(0), D(0), E(1) #3161281

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What is the most imp...
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