41. What does It refer to in Paragraph 2?
(A) The sixth century B.C.
(B) The plants in the Hanging Gardens of Babylon
(C) The process of growing crops in stacked layers
(D) The Babylonians’ practice of growing crops on water
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統計: A(9), B(74), C(32), D(211), E(0) #3128969
統計: A(9), B(74), C(32), D(211), E(0) #3128969