單項選擇題
AA級綠色蔬菜嚴格地要求在生產(chǎn)過程中不使用化學(xué)合成的肥料、農(nóng)藥、獸藥、飼料添加劑、食品添加劑和其他有害于環(huán)境和健康的物質(zhì)。它的生產(chǎn)屬于 [ ]
A.生態(tài)農(nóng)業(yè)
B.觀光農(nóng)業(yè)
C.精確農(nóng)業(yè)
D.外向型農(nóng)業(yè)
AA級綠色蔬菜嚴格地要求在生產(chǎn)過程中不使用化學(xué)合成的肥料、農(nóng)藥、獸藥、飼料添加劑、食品添加劑和其他有害于環(huán)境和健康的物質(zhì)。它的生產(chǎn)屬于 [ ]
A.生態(tài)農(nóng)業(yè)
B.觀光農(nóng)業(yè)
C.精確農(nóng)業(yè)
D.外向型農(nóng)業(yè)
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單項選擇題
Some insects ______ the color of their surroundings to protect themselves.tke inB．tke offC
Some insects ______ the color of their surroundings to protect themselves.tke inB．tke offC
．tkeSome insects ______ the color of their surroundings to protect themselves.tke in B．tke off C．tke on D．tke outA．take inB．take offC．take onD．take out