单项选择题
A.10~1000 B.100~10000 C.1000~100000 D.10000~1000000
A.0~1 B.0~2 C.0~3 D.0~4
A.不大于1% B.不大于3% C.不大于5% D.不大于7%
A.不大于±1% B.不大于±2% C.不大于±3% D.不大于±4%
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