問題詳情
【題組】47. What do we need in order to grow hydroponic vegetables?
(A) Fertile soil.
(B) Chemicals.
(C) Warm weather and sunlight.
(D) Fresh air and natural environment.
參考答案
答案：B
難度：簡單0.712644
統計：A(2),B(62),C(10),D(9),E(0)
用户評論
【Wendy】評論
hydroponic farms can use special material, such as charcoal and mixtures of chemicals