数据归约
参考答案：
缩小数据的取值范围，使其更适合于数据挖掘算法的需要，并且能够得到和原始数据相同的分析结果。
At the computer operation test, one is supposed to stay at his own machine, keep his eyes on his screen, ______ to anyone.
A．and not to speak
B．but could not speak
C．instead of speaking
D．or rather speak
分辨率是数字式仪表的重要性能指标之一分辨率是数字式仪表的灵敏度（即最高分辨力或分辨力）与（）的相对值（即比值）就是数字式仪表的分辨率
A、最低量程
B、最高量程
C、量程
D、测量值
