单项选择题

AA级绿色蔬菜严格地要求在生产过程中不使用化学合成的肥料、农药、兽药、饲料添加剂、食品添加剂和其他有害于环境和健康的物质。它的生产属于 [ ]

A.生态农业
B.观光农业
C.精确农业
D.外向型农业

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单项选择题

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

The words ’boys’ and ’raise’ have a common phoneme and a common morpheme as well.The words ’boys’ and ’raise’ have a common phoneme and a common morpheme as well. （）

答案：错误