38. Breakdown of the fat storage at brown fat tissue in some animals increases when ______.
(A) torpor
(B) exercising
(C) shivering
(D) hibernation
(E) sleeping
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統計: A(6), B(1), C(22), D(96), E(2) #2751513
統計: A(6), B(1), C(22), D(96), E(2) #2751513