阿摩線上測驗
42. One popular solar heating system makes use of _____
(A) roof collectors and underground storage tanks.
(B) fossil fuel conversion.
(C) underground oil tanks.
(D) water collection and evaporation.
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統計： A(8), B(0), C(1), D(0), E(0) #2337117
統計： A(8), B(0), C(1), D(0), E(0) #2337117
