33. According to the passage, which of the following is a downside of Aeroponics?
(A) Plants and the environment can easily be damaged.
(B) Less electrical power and lights are generated.
(C) A large quantity of waste water is constantly produced.
(D) The equipment requires regular cleaning and maintenance.

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統計: A(1), B(1), C(4), D(12), E(0) #4027959

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