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【单选题】
农产品生产记录应当保存的期限正确的是A.
至少一年
B.
至少二年
C.
至少三年
D.
至少四年
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皮皮学刷刷变学霸
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【简答题】放在真空炉内淬火可防止( A)A. 氧化和脱碳 B、开裂 C、硬度偏低 D、变形
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【多选题】GIS 中的误差是指 GIS 中数据表示与其现实世界本身的差别。数据误差的类型可以是随机的,也可以是系统的。归纳起来,数据的误差主要有四大类,即()。
A.
几何误差
B.
属性误差
C.
时间误差
D.
逻辑误差
【简答题】树形分裂算法的发送顺序对应一个数据压入()的顺序。
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【单选题】--- I’m sorry I won’t be able to go with you. --- But you _______ me you _________.
A.
told; were going to
B.
have told; were going to
C.
have told; would go to
D.
Had told; were going to
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