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单项选择题
A.50%、3次、10s
B.60%、3次、10s
C.70%、3次、10s
D.80%、3次、10s
单项选择题
A.1%,±0.25%
B.0.5%,±0.25%
C.1%,±0.5%
D.0.5%,±0.5%
单项选择题
A.0.1%~0.5%
B.0.3%~1%
C.0.5%~1%
D.0.8%~1%
单项选择题
A.20%,110%
B.20%,100%
C.50%,110%
D.50%,100%