单项选择题
在解题时,如果将解题方案加工成算术运算与逻辑运算的有限序列,这种加工常常表现为无穷过程的截断,由此产生的误差通常称为()。
A、舍入误差
B、截断误差
C、相对误差
D、绝对误差
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单项选择题
特征选择的四个步骤中不包括()
A.子集产生
B.子集评估
C.子集搜索
D.子集验证
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单项选择题
He _________ his life to the service of his country.
A.determined
B.decided
C.dedicated
D.distinguished
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