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【单选题】
关于小区设计，下列表述正确的是（）
A.
检测样品与标准样品必须分别种在不同田块里
B.
小区种植鉴定必须设立重复
C.
如果纯度标准要求为98.0%，则小区内必须种植200株
D.
当要对数量性状进行量化时，小区设计要采用符合田间统计要求的随机小区设计
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